Release v0.5.3

[gvonness-apolitical]

Summary

• Bump version to 0.5.3
• Changelog entry covering PRs Format source, dashboard client, scripts, and config files with Prettier #112–Add CLI command handler tests for hook, ingest, and archive #116

Changes in this release

• Formatted 79 files with Prettier, expanded format:check scope
• Fixed 2 stale MCP tool references in docs
• Removed unused filterAlreadyIngested() export
• Bumped @typescript-eslint 8.55→8.56
• Added 35 CLI command handler tests (1742 total)

Test plan

• npm run build passes
• npm test passes (1742 tests)
• npm run lint and npm run format:check pass