docs: add inline documentation for application.properties entries

[gsrtech100-wq]

Summary

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x ] 📝 Documentation update
• ♻️ Refactoring (no functional changes)
• 🔧 Chore (dependency updates, CI changes, etc.)

Related Issue

Closes #536

Changes Made

-- Added inline documentation comments for previously undocumented properties in application.properties

• Documented runtime, HTTP client, MongoDB, NATS, Vault, and JSON configuration settings

• Updated docs/changelog.md according to repository contribution guidelines

How to Test

1. Open src/main/resources/application.properties
2. Verify undocumented properties now contain explanatory comments
3. Confirm no configuration values were modified
4. Review docs/changelog.md entry for this change

Checklist

• My code follows the project's code style
• I have added tests that prove my fix/feature works
• Existing tests pass locally (./mvnw clean verify -DskipITs)
• [x ] I have updated documentation if needed
• [x ] My commit messages follow conventional commits
• I have not committed any secrets, API keys, or tokens
• [x ] This PR has a clear, focused scope (one concern per PR)

Summary by CodeRabbit

• Documentation
  • Expanded inline documentation for application.properties, adding clearer guidance and sectioning across runtime behavior, conversation migration, Qute rendering strictness, relational datasource and devservices, NATS JetStream stream/retry/ack settings, decrypted secrets caching, HTTP client pool/timeout/redirect limits, MongoDB configuration, and JSON/date-time formatting.
  • Updated the changelog with a new dated entry for these additions, plus a follow-up noting minor comment corrections (including a reserved setting marker).

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 4d4f554c-e17f-4cfb-93e0-b8477a5df78c

📥 Commits

Reviewing files that changed from the base of the PR and between 7b72bb2 and c0ea69a.

📒 Files selected for processing (2)

• docs/changelog.md
• src/main/resources/application.properties

✅ Files skipped from review due to trivial changes (2)

• docs/changelog.md
• src/main/resources/application.properties

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📝 Walkthrough

Walkthrough

Adds comment-only inline documentation to src/main/resources/application.properties across several configuration sections and records the update in docs/changelog.md, including a follow-up note for two later comment corrections.

Changes

Inline documentation for application.properties

Layer / File(s)	Summary
Inline comments across application.properties src/main/resources/application.properties	Adds # comment lines documenting project metadata/banner, conversation migration toggles, Qute strict-rendering, relational datasource activation and devservices, NATS JetStream stream/retry/ack settings, secrets vault TTL and cache size, HTTP client connection pooling/timeouts/redirects, MongoDB database/devservices, JSON pretty-print and epoch timestamp formatting, and the OpenAPI REST path. No property values are modified.
Changelog entry for inline docs docs/changelog.md	Prepends a 2026-06-19 entry for the inline documentation update and adds a 2026-06-30 follow-up note for two comment corrections.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 Hop hop, the configs now speak,
Each property no longer mystique.
A note for NATS, a clue for JSON,
The changelog hums with a tidy song,
And every knob has words to share. 🌿

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding inline docs for application.properties entries.
Linked Issues check	✅ Passed	The documented properties and comment-style updates align with #536's request for inline, usage-based context.
Out of Scope Changes check	✅ Passed	The extra comment updates stay within the documentation scope and changelog update, with no unrelated code changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[Copilot]

Pull request overview

Adds inline comments to previously undocumented application.properties entries to help operators and contributors understand configuration knobs, and records the change in the project changelog.

Changes:

• Added inline documentation comments for multiple runtime, migration, datasource, NATS, Vault, HTTP client, MongoDB, and JSON/Jackson properties.
• Added a changelog entry describing the documentation update.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/main/resources/application.properties	Adds/updates inline comments for various configuration properties (runtime, migrations, DB, messaging, vault, HTTP client, JSON).
docs/changelog.md	Adds a changelog entry documenting the inline configuration-comment update.

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