feat(sdk): Phase 3 — decommission bash orchestrator, TypeScript-only CLI

[Sillhouette]

Summary

Phase 3 of P0-typescript-sdk-migration: eliminate the 2,938-line bash orchestrator entirely. The genies command is now a direct npm bin entry pointing to compiled TypeScript — no shell shim, no fallback.

• Deleted scripts/genies (2,938 lines) and all 10 bash test files + fixtures
• Renamed genies-core → genies (single binary, no intermediary)
• Added 13 new TypeScript modules: artifact threading, slug utility, batch status surface, continuous daemon loop with signal handling, finisher (head chef quality pass), lockfile management, recovery mode, quality validation, worktree environment setup
• Wired all CLI flags to behavioral code: --dry-run, --no-worktree, --no-preflight, --lock, --cleanup-on-failure, per-phase turn overrides, --min-phase, --finish-mode
• Extended single-item executor with artifact path threading between phases, enhanced verdict detection (frontmatter → output text fallback), and min-turn retry
• Extended item-resolver with docs/topics/ scanning and --topics-file support
• Updated install.sh to distribute genies via npm link only, cleaning up legacy scripts

Tests: 212 → 373 (+161 new vitest tests, 0 bash tests remain)
Build: TypeScript compiles cleanly

New CLI subcommands

Subcommand	Purpose
genies status	Batch execution status from log directory
genies quality	Run validation scripts
genies recover	Integrate orphaned genie/* branches
genies daemon start	Continuous daemon with signal handling
genies daemon stop	Send SIGTERM to running daemon
genies daemon status	Display daemon status

Test plan

• npm test — 373 vitest tests passing
• npm run build — TypeScript compiles cleanly, no errors
• All CLI flags verified with behavioral tests (not just parsing)
• Finisher state machine exhaustively tested (12 state combinations)
• Daemon loop tested with cycle limits, cost caps, finisher integration
• Lockfile tested with PID liveness, stale detection
• Manual: npm link && genies check works end-to-end
• Manual: genies run executes phases without bash fallback

Refs: docs/backlog/P0-typescript-sdk-migration.md

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