Add state-hub v0.1 — local-first state service for the Custodian

Implements the first live layer of the Custodian cognitive infrastructure:
PostgreSQL schema, FastAPI REST API, FastMCP stdio server, and Observable
Framework telemetry dashboard.

- state-hub/: full stack (docker-compose, FastAPI, Alembic, MCP server, dashboard)
- 5 DB tables: topics, workstreams, tasks, decisions, progress_events
- 11 MCP tools + 5 resources registered in .mcp.json
- Observable dashboard: Overview, Workstreams, Decisions, Progress pages
- CLAUDE.md: session protocol (get_state_summary / add_progress_event ritual)
- ~/.claude/CLAUDE.md: global cross-project reference to the hub
- scripts/pull_image.py: WSL2 TLS-resilient Docker image downloader

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Makefile

@@ -0,0 +1,35 @@
+.PHONY: install db db-tools migrate seed api dashboard check start clean
+
+COMPOSE = docker compose -f infra/docker-compose.yml --env-file .env
+
+install:
+	uv sync
+
+db:
+	$(COMPOSE) up -d postgres
+
+db-tools:
+	$(COMPOSE) --profile tools up -d
+
+migrate:
+	uv run alembic upgrade head
+
+seed:
+	uv run python scripts/seed.py
+
+api:
+	uv run uvicorn api.main:app --reload --host 127.0.0.1 --port 8000
+
+dashboard:
+	cd dashboard && npm run dev
+
+check:
+	curl -sf http://127.0.0.1:8000/state/health | python3 -m json.tool
+
+start: db
+	sleep 3
+	$(MAKE) migrate
+	$(MAKE) api
+
+clean:
+	$(COMPOSE) down -v