Feat: add taxonomy and term publish, unpublish, localize, and unlocalize support

[reeshika-h]

Summary

• Adds Taxonomy.publish() / Taxonomy.unpublish() (POST /taxonomies/publish / /unpublish), closing the parity gap with the JS SDK per DX-9676
• Adds Taxonomy.localize() / Taxonomy.unlocalize() and Terms.localize() / Terms.unlocalize() for locale-scoped taxonomy/term operations
• branch header passthrough works via the existing generic addHeader() mechanism, no new parameter needed
• All six methods were live-verified end-to-end against a real stack (not just request-shape assertions) — publish/unpublish return real job_ids, localize/unlocalize round-trip cleanly (201 Created / 204 No Content) with zero residual changes to real data

Test plan

• mvn clean test — UnitTestSuite: 245 tests, 0 failures; APISanityTestSuite: 219 tests, 0 failures
• Live-verified publish/unpublish against a real taxonomy (200, real job_id)
• Live-verified localize/unlocalize at both taxonomy and term level (create → 201, delete → 204, restore confirmed via fetch)
• Fixed a pre-existing gap where TaxonomyTest.java (package-private) was never wired into UnitTestSuite and so never ran under mvn test

Out of scope

• Term-level localize/unlocalize was added per follow-up request but is not yet covered in the original DX-9674 TRD text — flagging for TRD update if needed
• Python/.NET/JS parity fixes from the TRD are not part of this PR (Java-only)

🤖 Generated with Claude Code

[github-actions]

🔒 Security Scan Results

ℹ️ Note: Only vulnerabilities with available fixes (upgrades or patches) are counted toward thresholds.

Check Type	Count (with fixes)	Without fixes	Threshold	Result
🔴 Critical Severity	0	0	10	✅ Passed
🟠 High Severity	0	0	25	✅ Passed
🟡 Medium Severity	0	0	500	✅ Passed
🔵 Low Severity	0	0	1000	✅ Passed

⏱️ SLA Breach Summary

✅ No SLA breaches detected. All vulnerabilities are within acceptable time thresholds.

Severity	Breaches (with fixes)	Breaches (no fixes)	SLA Threshold (with/no fixes)	Status
🔴 Critical	0	0	15 / 30 days	✅ Passed
🟠 High	0	0	30 / 120 days	✅ Passed
🟡 Medium	0	0	90 / 365 days	✅ Passed
🔵 Low	0	0	180 / 365 days	✅ Passed

✅ BUILD PASSED - All security checks passed