chore: bootstrap SDLC state machine for tidalDB
- Initialize .sdlc/ with config, guidance, and state machine
- Register M0-M8 as released milestones (full engine track history)
- Seed M9 (Community Sync & Revocation) and M10 (Governance & Agent Rights) with features
- Seed product milestones P0-P4 and PG1 gate with features from existing planning docs
- Add Team section to AGENTS.md (tidal-engineer, tidal-visionary, tidal-researcher, tidal-storyteller)
- Add knowledge-librarian agent for .sdlc/knowledge/ curation
- Gitignore .sdlc/telemetry.redb (volatile binary state)
- Add .ai/ scaffold (project knowledge index)
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