MWPW-196039: Scope bulk publish projects folder per subtenant

[Axelcureno]

Resolves https://jira.corp.adobe.com/browse/MWPW-196039

Moves bulk publish projects from /content/dam/mas/bulk-publish-projects/{surface} to /content/dam/mas/{surface}/bulk-publish-projects so IAM POWERUSERS publish rights can be scoped per surface.

• BULK_PUBLISH_PARENT_PATH → BULK_PUBLISH_PROJECTS_FOLDER; all parentPath construction routed through getBulkPublishParentPath(surface) in mas-repository
• Per-subtenant folders already created in prod (2026-06-11)
• Out of scope: migration of existing tenant-root projects (follow-up ticket) and IAM group scoping (ops)

Verified locally: project create returns 201 with the new parentPath; project list queries the new path.

QA Checklist: https://wiki.corp.adobe.com/display/adobedotcom/M@S+Engineering+QA+Use+Cases

• C1. Cover code with Unit Tests
• C2. Add a Nala test (double check with #fishbags if nala test is needed)
• C3. Verify all Checks are green (unit tests, nala tests)
• C4. PR description contains working Test Page link where the feature can be tested
• C5: you are ready to do a demo from Test Page in PR
• C.6 read your Jira one more time to validate that you've addressed all AC's and nothing is missing

Test URLs:

• Before: https://main--mas--adobecom.aem.live/
• After: https://mwpw-196039--mas--adobecom.aem.live/

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Commits

• ed243c8 ✅ (latest)
• 65ca2ff ✅
• a67806a ✅
• 97f99d6 ✅
• 844269d ✅
• dbed721 ✅
• dac2ef0 ✅
• 9b4f759 ✅

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.25%. Comparing base (4770599) to head (ed243c8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #965      +/-   ##
==========================================
+ Coverage   89.21%   89.25%   +0.03%     
==========================================
  Files         264      264              
  Lines       82885    82889       +4     
==========================================
+ Hits        73945    73979      +34     
+ Misses       8940     8910      -30     

Files with missing lines	Coverage Δ
studio/src/bulk-publish/mas-bulk-publish-editor.js	88.80% <100.00%> (-0.02%)	⬇️
studio/src/bulk-publish/mas-bulk-publish.js	93.22% <100.00%> (ø)
studio/src/mas-repository.js	74.29% <100.00%> (+0.05%)	⬆️

... and 6 files with indirect coverage changes

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