feat: boot timing + dynamic imports for lean daemon mode

[mistercrunch]

Summary

• Boot timing instrumentation: Added performance.now() timing to every major boot phase in startDaemon() and startup() — config load, service tier resolution, DB init, registerServices, registerHooks, registerRoutes, plus sub-step timing for orphan cleanup, health monitor, master secret, app.listen, scheduler init, gateway init, and total boot time. All logged with ⏱️ [boot] prefix for easy grep.

• Dynamic imports for 10+ conditionally-loaded services: Converted top-level import statements to await import() gated on svcEnabled() for: SchedulerService, TerminalsService, gateway (4 modules), boards (3 modules), cards (2 modules), artifacts, leaderboard, and MCP servers. When disabled via config, these modules are never loaded — zero overhead.

• Lean mode preset docs + example config: Added documentation to DaemonServicesConfig describing the recommended lean/headless preset, and included config-lean.example.yaml with the minimal config for k8s deployments.

What each gated service does and its boot cost

Service	What it does	Boot cost
scheduler	Cron-based session spawning — timer loop + DB polling every 30s	Module load + timer setup
terminals	Web terminal via xterm.js — node-pty native bindings	Native module load (node-pty)
gateway	Slack/Discord/GitHub integrations — Socket Mode listeners, channel cache	SDK load + channel state refresh + listener startup
boards	Spatial canvas boards, board-objects, board-comments	3 service registrations, DB repos
cards	Kanban cards + card type definitions	2 service registrations
artifacts	Sandpack artifact previews — bundler detection	Service + filesystem probe
file_browser	File/context browsing endpoints	3 service registrations
leaderboard	Usage analytics / cost tracking	DB aggregation queries
mcp_servers	MCP server configuration + OAuth	Complex OAuth setup, token cache
static_files	UI static file serving	Express static middleware

Lean mode config gains

With config-lean.example.yaml, the daemon skips:

• 8 service groups (scheduler, terminals, gateway, boards, cards, artifacts, file_browser, leaderboard) + static files
• ~15 module loads that would otherwise happen at import time
• 0 background timers (no scheduler tick, no gateway listeners)
• 0 native bindings (no node-pty)

Essential services preserved: core (sessions/tasks/messages), worktrees, repos, users, mcp_servers.

Boot timing output format

⏱️  [boot] Handlebars helpers: 2ms
⏱️  [boot] Config load: 15ms
⏱️  [boot] Service tier resolution: 1ms
⏱️  [boot] Database init: 89ms
⏱️  [boot] Phase 1 — registerServices: 234ms
⏱️  [boot] Phase 2 — registerHooks: 12ms
⏱️  [boot] Phase 3 — registerRoutes: 45ms
⏱️  [boot]   cleanupOrphans: 28ms
⏱️  [boot]   createHealthMonitor: 3ms
⏱️  [boot]   ensureMasterSecret: 5ms
⏱️  [boot]   app.listen: 18ms
⏱️  [boot]   scheduler init: 4ms
⏱️  [boot]   gateway init (async): 156ms
⏱️  [boot] Phase 4 — startup: 312ms
⏱️  [boot] Total boot time: 791ms

Test plan

• pnpm check passes (typecheck + lint + build)
• Run daemon with full config — verify all timing lines appear
• Run daemon with config-lean.example.yaml — verify disabled services are not imported
• Verify no regression in service registration (all endpoints respond)

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