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>

api/schemas/__init__.py

@@ -0,0 +1,15 @@
+from api.schemas.topic import TopicCreate, TopicUpdate, TopicRead, TopicWithWorkstreams
+from api.schemas.workstream import WorkstreamCreate, WorkstreamUpdate, WorkstreamRead
+from api.schemas.task import TaskCreate, TaskUpdate, TaskRead
+from api.schemas.decision import DecisionCreate, DecisionUpdate, DecisionRead
+from api.schemas.progress_event import ProgressEventCreate, ProgressEventRead
+from api.schemas.state import StateSummary, Totals, TopicTotals, WorkstreamTotals, TaskTotals, DecisionTotals
+
+__all__ = [
+    "TopicCreate", "TopicUpdate", "TopicRead", "TopicWithWorkstreams",
+    "WorkstreamCreate", "WorkstreamUpdate", "WorkstreamRead",
+    "TaskCreate", "TaskUpdate", "TaskRead",
+    "DecisionCreate", "DecisionUpdate", "DecisionRead",
+    "ProgressEventCreate", "ProgressEventRead",
+    "StateSummary", "Totals", "TopicTotals", "WorkstreamTotals", "TaskTotals", "DecisionTotals",
+]