[P4] GitHub Hygiene: Update Epic #1089 with Phase 1 progress

[Delqhi]

Task

Update Epic #1089 on GitHub to reflect Phase 1 completion.

What to update

• Title: Already correct
• Body: Add Phase 1 progress section showing b23dd7b is complete
• Link to commit: b23dd7b
• Mark Phase 1 tasks as done in the epic body
• Add next steps (this plan covers Phases 2-6)

Phase 1 completion summary (b23dd7b)

• 14 runtime tool implementations under packages/opensin-sdk/src/core/tools/
• 14 plugin manifests (dual root + .sin-plugin/)
• Bun-only migration (packageManager: bun@1.3.12)
• 67/67 tests passing
• .gitignore fix for .sin-plugin/ exceptions
• Test repairs (vitest imports, regex fixes)

Validation

Epic #1089 body reflects Phase 1 complete state

Linked Epic

Epic #1089

[Delqhi]

Complete: Epic #1089 body updated with comprehensive Phase 1 progress summary including all commits (b23dd7b, 7f232a3, 2c0eba0) and remaining work tracked in #1096-#1113.

[github-actions]

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