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>

dashboard/src/progress.md

@@ -0,0 +1,77 @@
+---
+title: Progress
+---
+
+# Progress Log
+
+*Append-only per constitution §5 — no deletions.*
+
+```js
+const events = await FileAttachment("data/progress.json").json();
+const data = Array.isArray(events) ? events : [];
+```
+
+```js
+const authorFilter = view(Inputs.select(
+  ["(all)", ...new Set(data.map(e => e.author ?? "unknown"))],
+  { label: "Author" }
+));
+const typeFilter = view(Inputs.select(
+  ["(all)", ...new Set(data.map(e => e.event_type))],
+  { label: "Event type" }
+));
+const sinceFilter = view(Inputs.date({ label: "Since" }));
+```
+
+```js
+const filtered = data.filter(e =>
+  (authorFilter === "(all)" || (e.author ?? "unknown") === authorFilter) &&
+  (typeFilter === "(all)" || e.event_type === typeFilter) &&
+  (!sinceFilter || new Date(e.created_at) >= sinceFilter)
+);
+
+display(html`<p><strong>${filtered.length}</strong> events shown (append-only, no deletions).</p>`);
+
+display(Inputs.table(filtered.map(e => ({
+  Time: new Date(e.created_at).toLocaleString(),
+  Type: e.event_type,
+  Author: e.author ?? "—",
+  Summary: e.summary,
+})), { rows: 50 }));
+```
+
+## Event Volume (Last 30 Days)
+
+```js
+import * as Plot from "npm:@observablehq/plot";
+
+const cutoff = new Date();
+cutoff.setDate(cutoff.getDate() - 30);
+
+const byDay = data
+  .filter(e => new Date(e.created_at) >= cutoff)
+  .reduce((acc, e) => {
+    const day = e.created_at.slice(0, 10);
+    acc[day] = (acc[day] ?? 0) + 1;
+    return acc;
+  }, {});
+
+display(Plot.plot({
+  title: "Progress Events per Day (30-day window)",
+  x: { label: "Date", tickRotate: -30 },
+  y: { label: "Events", grid: true },
+  marks: [
+    Plot.areaY(
+      Object.entries(byDay).sort().map(([day, count]) => ({ day, count })),
+      { x: "day", y: "count", fill: "steelblue", fillOpacity: 0.3 }
+    ),
+    Plot.lineY(
+      Object.entries(byDay).sort().map(([day, count]) => ({ day, count })),
+      { x: "day", y: "count", stroke: "steelblue" }
+    ),
+    Plot.ruleY([0]),
+  ],
+  marginBottom: 60,
+  width: 750,
+}));
+```