Migrate Forgejo from Homebrew to source build (#316)
## Summary
- Migrate Forgejo from Homebrew to source-built binary with mcquack LaunchAgent
- Matches the established pattern used by zot, caddy, and alloy
- Upgrades to v14.0.3 (7 security fixes: PKCE bypass, OAuth scope bypass, open redirect, and more)
## Changes
- **Ansible role**: Replace brew install/services with binary stat check + LaunchAgent
- **Paths**: `/opt/homebrew/var/forgejo` → `~/forgejo`, binary at `~/code/3rd/forgejo/forgejo`
- **Run user**: `forgejo` → `erichblume` (LaunchAgent user; SSH git user stays `forgejo`)
- **Docs**: Updated Forgejo reference card, restart-indri guide
- **Service review**: Stamped frigate-notify, cloudnative-pg, blumeops-pg as current
## One-time migration steps (manual, on indri)
1. Clone from Codeberg, add forge mirror remote
2. Check out v14.0.3, build with `make build && make forgejo`
3. Stop brew, `cp -a` data to `~/forgejo`, fix ownership
4. Run `provision-indri --tags forgejo`
5. Verify, then `brew uninstall forgejo`
## Data safety
- `cp -a` preserves everything (repos, SQLite DB, LFS, sessions, OAuth config)
- Brew version stays installed as rollback until verification passes
- No schema changes between 14.0.2 → 14.0.3
Reviewed-on: #316
Erich Blume
3017f759a7