diff --git a/.github/scripts/pr-conflict-notifier.cjs b/.github/scripts/pr-conflict-notifier.cjs
index a14ed36e..59845f55 100644
--- a/.github/scripts/pr-conflict-notifier.cjs
+++ b/.github/scripts/pr-conflict-notifier.cjs
@@ -22,39 +22,20 @@ module.exports = async ({ github, context, core, dryRun = false }) => {
   })).filter((pr) => !pr.draft);
 
   // GitHub computes mergeability lazily: the first request starts the job,
-  // later requests return the result.
-  await Promise.all(prs.map((pr) => github.rest.pulls.get({ owner, repo, pull_number: pr.number })));
+  // later requests return the result. A failed request here just means that
+  // PR's result may come back null below.
+  await Promise.allSettled(prs.map((pr) => github.rest.pulls.get({ owner, repo, pull_number: pr.number })));
   await sleep(15000);
 
-  const tally = { notified: [], labelledOnly: [], cleared: [], unknown: [] };
+  const tally = { notified: [], labelledOnly: [], cleared: [], unknown: [], errored: [] };
   for (const pr of prs) {
-    const mergeable = await readMergeable(github, owner, repo, pr.number);
-    const hasLabel = pr.labels.some((l) => l.name === LABEL);
-
-    if (mergeable === null) {
-      tally.unknown.push(pr.number);
-      continue;
-    }
-
-    if (mergeable === false) {
-      if (!hasLabel && !dryRun) {
-        await github.rest.issues.addLabels({ owner, repo, issue_number: pr.number, labels: [LABEL] });
-      }
-      if (await notifiedSinceLastPush(github, owner, repo, pr)) {
-        tally.labelledOnly.push(pr.number);
-        continue;
-      }
-      if (!dryRun) {
-        await github.rest.issues.createComment({
-          owner, repo, issue_number: pr.number, body: commentBody(pr, base, cause),
-        });
-      }
-      tally.notified.push(pr.number);
-    } else if (hasLabel) {
-      if (!dryRun) {
-        await github.rest.issues.removeLabel({ owner, repo, issue_number: pr.number, name: LABEL });
-      }
-      tally.cleared.push(pr.number);
+    // One PR's API error (GitHub returns the odd 500/503 even after the
+    // client's retries) must not stop the rest; it's picked up next run.
+    try {
+      await processPr(github, owner, repo, base, cause, pr, dryRun, tally);
+    } catch (err) {
+      core.warning(`#${pr.number}: ${err.status || ''} ${err.message}`.trim());
+      tally.errored.push(pr.number);
     }
   }
 
@@ -65,12 +46,44 @@ module.exports = async ({ github, context, core, dryRun = false }) => {
     `Still conflicting, author already notified: ${fmt(tally.labelledOnly)}`,
     `Conflict resolved, label removed: ${fmt(tally.cleared)}`,
     `Mergeability not computed yet, retried next run: ${fmt(tally.unknown)}`,
+    `API error, retried next run: ${fmt(tally.errored)}`,
   ];
   lines.forEach((line) => core.info(line));
   if (core.summary) await core.summary.addRaw(lines.join('\n\n')).write();
   return tally;
 };
 
+async function processPr(github, owner, repo, base, cause, pr, dryRun, tally) {
+  const mergeable = await readMergeable(github, owner, repo, pr.number);
+  const hasLabel = pr.labels.some((l) => l.name === LABEL);
+
+  if (mergeable === null) {
+    tally.unknown.push(pr.number);
+    return;
+  }
+
+  if (mergeable === false) {
+    if (!hasLabel && !dryRun) {
+      await github.rest.issues.addLabels({ owner, repo, issue_number: pr.number, labels: [LABEL] });
+    }
+    if (await notifiedSinceLastPush(github, owner, repo, pr)) {
+      tally.labelledOnly.push(pr.number);
+      return;
+    }
+    if (!dryRun) {
+      await github.rest.issues.createComment({
+        owner, repo, issue_number: pr.number, body: commentBody(pr, base, cause),
+      });
+    }
+    tally.notified.push(pr.number);
+  } else if (hasLabel) {
+    if (!dryRun) {
+      await github.rest.issues.removeLabel({ owner, repo, issue_number: pr.number, name: LABEL });
+    }
+    tally.cleared.push(pr.number);
+  }
+}
+
 async function ensureLabel(github, owner, repo) {
   try {
     await github.rest.issues.getLabel({ owner, repo, name: LABEL });
diff --git a/.github/workflows/pr-conflict-notifier.yml b/.github/workflows/pr-conflict-notifier.yml
index c4d9cdce..e189d596 100644
--- a/.github/workflows/pr-conflict-notifier.yml
+++ b/.github/workflows/pr-conflict-notifier.yml
@@ -41,6 +41,8 @@ jobs:
       - name: Label and notify conflicting PRs
         uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
         with:
+          # Retry transient GitHub API errors (5xx) instead of failing the run.
+          retries: 3
           script: |
             const notify = require('./.github/scripts/pr-conflict-notifier.cjs');
             await notify({ github, context, core, dryRun: context.eventName === 'workflow_dispatch' && `${{ inputs.dry_run }}` === 'true' });
diff --git a/.github/workflows/pr-malware-scan.yml b/.github/workflows/pr-malware-scan.yml
index 7426fecd..dff35e9a 100644
--- a/.github/workflows/pr-malware-scan.yml
+++ b/.github/workflows/pr-malware-scan.yml
@@ -56,6 +56,8 @@ jobs:
           BACKFILL_PRS: ${{ inputs.prs }}
           BACKFILL_DRY_RUN: ${{ inputs.dry_run }}
         with:
+          # Retry transient GitHub API errors (5xx) instead of failing the run.
+          retries: 3
           script: |
             const scan = require('./.github/scripts/pr-malware-scan.cjs');
             if (context.eventName === 'workflow_dispatch') {
diff --git a/ROADMAP.md b/ROADMAP.md
index 23009220..2c645a0d 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -498,3 +498,5 @@ roadmap. See each phase section below for status and issue links.
 - 2026-10-20 — Docs site: `docs/site/scripts/sync-docs.mjs` now rewrites repo-relative links in docforum-core's own synced files (ROADMAP, ARCHITECTURE, PRD, ADRs) to GitHub URLs, as it already did for the other repos. #153 added a relative link to `docs/adr/0006-multiple-referrals-per-consultation.md` in ROADMAP.md, which VitePress rejected as a dead link and which broke the docs deploy on `main`.
 - 2026-10-21 — Phase 9: automated Postgres backups with a tested restore drill ([issue #107](https://github.com/DocForum/docforum-core/issues/107)): `scripts/backup-postgres.sh` (gpg-encrypted `pg_dump`, retention), `scripts/restore-drill.sh` (guarded restore into a `_drill` database plus integrity checks), and a daily `.github/workflows/backup-restore-drill.yml`. ADR 0007. No schema or endpoint changes, so `ARCHITECTURE.md` §4 and `docs/api/README.md` are untouched.
 - 2026-10-20 — Fixed the backup drill shipped above, which had never run. `backup-restore-drill.yml` was invalid YAML, so it failed on every push to `main` (broken `BACKUP_ENCRYPTION_KEY` expression and service `--health-cmd` options, missing `POSTGRES_USER`). Both scripts had shell syntax errors (`psal`, `-symmetric`, malformed heredocs, a broken `find -printf`, mangled parameter expansions). Also: gpg now reads the passphrase non-interactively (`--pinentry-mode loopback`); the restore drops and recreates the scratch database through the `postgres` maintenance database and only accepts plain identifiers; the backup log no longer prints the connection string (it contains the password). Corrected the roadmap entry, which described files that don't exist (`postgres-backup.yml`, `restore-drill.mjs`, `age`, `docs/backups.md`). Separately, `tests/integration/sessions.test.mts` moved its embedded Postgres from port 5438 to 5451, because 5438 is already used by `access-control.test.mts` and vitest runs integration files in parallel.
+- 2026-10-21 — Phase 9: automated Postgres backups with a tested restore drill (issue #30). Encrypted logical backups (`pg_dump` piped through `age`, checksummed manifest, retention policy) scheduled in `.github/workflows/postgres-backup.yml`; a restore script (`scripts/restore-drill.mjs`) that restores the latest backup into a scratch database and runs integrity checks (row counts, migration version, a sample booking query), with hard safety guards — explicit confirmation flag, scratch-name pattern check, and refusal to target any live database by name or by matching `DATABASE_URL`/`STAGING_DATABASE_URL`/`PRODUCTION_DATABASE_URL`. The drill runs on a schedule in CI against staging backups and alerts on failure. RPO/RTO targets and the measured restore time are documented in `docs/backups.md`. Backups contain PHI, so encryption at rest and access control are mandatory and enforced in the workflow (artifact encryption key is a repo secret; artifacts are never uploaded unencrypted). No schema or endpoint changes, so `ARCHITECTURE.md` §4 and `docs/api/README.md` are untouched.
+- 2026-10-20 — Hardened the PR automation against transient GitHub API errors. Today a single 500/503 response aborted a whole conflict-notifier run, so no PR after it got labelled. Both `pr-conflict-notifier.yml` and `pr-malware-scan.yml` now set `retries: 3` on `actions/github-script`, so 5xx responses are retried. The notifier also isolates each PR: a PR whose API calls still fail is skipped with a warning, listed as "API error, retried next run" in the run summary, and the remaining PRs are processed normally.