Launch TeamLoop open-source V1

[ayushhagarwal]

What changed?

• implements all six Slack activity flows: lunch, dinner, potluck, weekend run, marathon, and HYROX
• adds live RSVP cards, preferences, potluck claims, summaries, organizer controls, and reminders
• adds PostgreSQL/Prisma persistence, local bot-token mode, and encrypted OAuth installation storage
• adds Docker Compose, CI, tests, Slack manifest, self-hosting and privacy documentation
• adds open-source governance, support, issue templates, Dependabot, CODEOWNERS, and release automation

Why?

This is the production-quality, self-hostable TeamLoop V1 foundation and prepares the repository for public collaboration and semantic releases.

Verification

• npm run format:check
• npm run lint
• npm run typecheck
• npm test — 21 tests passing
• npm run build
• Prisma schema validation
• dependency audit — 0 vulnerabilities
• secret-pattern scan

Merge strategy

Rebase merge after CI succeeds. The feature branch should be deleted after merge.

[ayushhagarwal]

Maintainer review completed.

Reviewed the full launch diff for architecture, Slack interaction acknowledgement, organizer authorization, closed/cancelled RSVP behavior, reminder idempotency, token handling, secret hygiene, release automation, CI, and open-source documentation.

Verification:

• CI quality check passed
• 21 tests passed locally and in CI
• formatting, lint, strict typecheck, and build passed
• Prisma schema validated
• dependency audit reported 0 vulnerabilities
• branch is conflict-free and up to date with main

No blocking findings. Ready for rebase merge.