v2.0.0-alpha: BooCoder foundation — container, schema, DB rename

Phase 1 of v2.0. BooCoder is live at port 9502 with a health endpoint.

- Database renamed: ALTER DATABASE boocode RENAME TO boochat (one-time).
  All services updated to connect to /boochat. Docker service name stays
  boocode_db (rename is internal to Postgres, not Docker).

- New apps/coder/ app skeleton: Fastify server with health endpoint,
  postgres connection, schema apply on boot. Mirrors apps/server pattern
  but minimal (no inference loop yet — Phase 2).

- Schema: pending_changes (operation queue before /apply), tasks (dispatch
  DAG with state machine), available_agents (startup-probed agent registry),
  human_inbox view (tasks WHERE state IN blocked/failed). All IF NOT EXISTS,
  idempotent on re-run. Same boochat database, different tables.

- Dockerfile: Node 20 bookworm-slim (glibc for future node-pty in Phase 5).
  Multi-stage build matching the existing boocode image pattern.

- docker-compose.yml: boocoder service on 100.114.205.53:9502, /opt:/opt:rw
  mount (write-capable, policy-gated at tool layer), depends on boocode_db.

- BOOCODER.md: container guidance declaring write-tool capability +
  pending-changes discipline.

All 4 services boot and pass health checks. 9 tables in the shared DB.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/coder/src/schema.sql

@@ -0,0 +1,48 @@
+-- v2.0.0: BooCoder schema — pending changes, tasks, agent registry.
+-- Applied on startup by apps/coder/src/db.ts:applySchema().
+-- Lives in the same 'boochat' database as BooChat's tables.
+
+CREATE TABLE IF NOT EXISTS pending_changes (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  session_id UUID NOT NULL,
+  task_id UUID,
+  file_path TEXT NOT NULL,
+  operation TEXT NOT NULL,
+  diff TEXT NOT NULL,
+  status TEXT NOT NULL DEFAULT 'pending',
+  created_at TIMESTAMPTZ NOT NULL DEFAULT clock_timestamp(),
+  CONSTRAINT pending_changes_operation_chk CHECK (operation IN ('create', 'edit', 'delete')),
+  CONSTRAINT pending_changes_status_chk CHECK (status IN ('pending', 'applied', 'rejected', 'reverted'))
+);
+
+CREATE TABLE IF NOT EXISTS tasks (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  project_id UUID NOT NULL,
+  parent_task_id UUID REFERENCES tasks(id),
+  state TEXT NOT NULL DEFAULT 'pending',
+  input TEXT NOT NULL,
+  output_summary TEXT,
+  agent TEXT,
+  model TEXT,
+  execution_path TEXT,
+  worktree_path TEXT,
+  cost_tokens INTEGER,
+  started_at TIMESTAMPTZ,
+  ended_at TIMESTAMPTZ,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT clock_timestamp(),
+  CONSTRAINT tasks_state_chk CHECK (state IN ('pending', 'running', 'completed', 'failed', 'blocked', 'cancelled')),
+  CONSTRAINT tasks_execution_path_chk CHECK (execution_path IS NULL OR execution_path IN ('native', 'acp', 'pty'))
+);
+
+CREATE TABLE IF NOT EXISTS available_agents (
+  name TEXT PRIMARY KEY,
+  install_path TEXT,
+  version TEXT,
+  supports_acp BOOLEAN NOT NULL DEFAULT false,
+  supports_mcp_client BOOLEAN NOT NULL DEFAULT false,
+  last_probed_at TIMESTAMPTZ
+);
+
+-- Human inbox: tasks needing attention
+CREATE OR REPLACE VIEW human_inbox AS
+  SELECT * FROM tasks WHERE state IN ('blocked', 'failed');