Implement wave of parallel TDD lanes in isolated worktrees

Parallel implementation of independent features or refactors when territories are pre-assigned and disjoint, each requiring TDD-first discipline and isolated build cache.

• · lanes array: [{id, territory, item, prompt, highRisk?}]
• · each lane territory must be disjoint (orchestrator guarantees no overlap + hot shared files assigned to single owner)
• · highRisk flag (optional, sets effort=high)

• · per-lane result: {id, territory, status (opened-pr|committed-no-pr|blocked|abandoned), branch, commits (SHA array), localGate (fmt/clippy/test/deny result), filesTouched, summary, blockers}
• · opened PR for each lane (if green)
• · committed TDD+implementation per lane (red test first, then green implementation)

• · worktree isolation (EnterWorktree/ExitWorktree)
• · git (branch, commit, push, pr create)
• · local gate (cargo fmt, cargo clippy, cargo test, cargo deny, web linting if web/ touched)

• · territories must be disjoint (orchestrator responsibility before calling)
• · hot shared files (pipeline.rs, engine/{runtime,clock,drive}.rs, control/{routes/mod,openapi,state}.rs) assigned to single owner only
• · each lane has its own isolated worktree (no target/ sharing)
• · base branch is current origin/main (rebase if stale)

• · lane edits hot shared file it doesn't own (violates NON-NEGOTIABLE rule)
• · TDD test commit missing or red output not pasted
• · unwrap/expect/panic in non-test code
• · local gate fails (fmt, clippy, test, or web checks)
• · PR opened before green (status=blocked if gate not passing)
• · territory boundaries miscommunicated by orchestrator (overlapping lanes)

• · NON-NEGOTIABLE rules: stay in territory, TDD (red test first), absolute typing (no #[allow] without justification), full local gate before PR
• · LANE_RESULT schema: 9 required fields (id, territory, status, branch, commits, localGate, summary, filesTouched, blockers)
• · Conventional Commits + Co-Authored-By trailer per commit
• · red test commit as first commit in the series (verifiable in git log)
• · localGate field contains exact pass/fail + failing output (verifiable)
• · blockers field for handoffs to hot-file owners (wiring described, not implemented)