chore: added missing changelog entries

[tsivaprasad]

Fixup missing changelog entries for the next release:

✗ changie batch minor --dry-run

v0.9.0 - 2026-06-11

Added

• Added pg_hba_conf and pg_ident_conf fields to the database spec — Operators can now supply custom pg_hba.conf and pg_ident.conf entries at the database or per-node level, giving full control over client authentication rules and ident mappings. Per-node entries take first-match priority over database-level entries.
• Added Knowledge Base search support to the MCP service — Enable the search_knowledgebase tool via the kb_enabled option in the MCP service configuration, with support for OpenAI and Voyage AI embedding providers. The Knowledge Base file is loaded from a configurable host path and mounted read-only into the container.

Fixed

• Fixed global Patroni parameters not being applied to running systemd-managed database clusters — Dynamic configuration changes are now patched directly via the Patroni API on the primary instance, ensuring parameters that cannot be changed via config file reload take effect immediately.
• Fixed valid instance IDs being incorrectly rejected by the API when the database ID was at its maximum allowed length — Instance IDs are an internal aggregate of the database ID, node name, and host hash, and are no longer subject to the same length limit as user-supplied identifiers.
• Fixed Postgres logging not being enabled by default on Debian-based systemd deployments — The default log configuration that was already applied to RPM-based deployments is now also applied to Debian-based ones.

PLAT-642

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: a9baaeed-fa54-4c2d-b206-5b0607b1242b

📥 Commits

Reviewing files that changed from the base of the PR and between dbb5df5 and 9398bb4.

📒 Files selected for processing (5)

• changes/unreleased/Added-20260611-090000.yaml
• changes/unreleased/Added-20260611-090010.yaml
• changes/unreleased/Fixed-20260611-090000.yaml
• changes/unreleased/Fixed-20260611-090010.yaml
• changes/unreleased/Fixed-20260611-090020.yaml

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📝 Walkthrough

Walkthrough

Five changelog entries are added to document pending database configuration features and bug fixes: custom pg_hba.conf and pg_ident.conf support, MCP Knowledge Base search capability, Patroni dynamic parameter application via API, instance ID validation correction, and default Postgres logging for Debian-based deployments.

Changes

Unreleased changelog updates

Layer / File(s)	Summary
Changelog entries for pending features and fixes changes/unreleased/Added-20260611-090000.yaml, changes/unreleased/Added-20260611-090010.yaml, changes/unreleased/Fixed-20260611-090000.yaml, changes/unreleased/Fixed-20260611-090010.yaml, changes/unreleased/Fixed-20260611-090020.yaml	Two feature entries document custom pg_hba.conf/pg_ident.conf database configuration and MCP Knowledge Base search support. Three fixes address Patroni global parameter application, instance ID validation at max database ID length, and default Postgres logging on Debian systemd clusters.

Poem

🐰 Five little notes in YAML's gentle way,
Document the features coming today,
Postgres configs, search, and fixes too,
All pending release—a rabbit's debut! 🌿✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'chore: added missing changelog entries' is directly related to the changeset, which adds missing changelog entries for the v0.9.0 release across multiple YAML files.
Description check	✅ Passed	The PR description includes a comprehensive summary of all changelog additions (2 items) and fixes (3 items), but lacks the structured template sections like explicit Changes, Testing, and Checklist.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch PLAT-642-cleanup-release-notes-for-v-0-9-0

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