Durable topology jobs (1/4): job-table schema + repo

Evolve topology_runs into a durable-job table (migration 0009): status state
machine (queued/running/completed/failed/cancelled), kind, input graph,
per-step checkpoint, error, last_event_id, timestamps. comparison becomes
nullable (the result blob, absent until completion). Back-compat: existing
rows default to completed/compare.

cm-db repo gains the durable-job ops: enqueue_run, claim_next_queued (CAS via
FOR UPDATE SKIP LOCKED), checkpoint, complete, fail, requeue_stale (resume
sweep), and status(). Regenerated .sqlx cache. Also fix two pre-existing test
RuntimeConfig literals missing the providers field (from the registry work).

Co-Authored-By: Claude Opus 4.8 <[email protected]>

.sqlx/query-fafbe27a2854e8884efec77567bcf258da8d9c1b825b8e8dcfdc2c90efea31b1.json

@@ -0,0 +1,17 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "INSERT INTO topology_runs (id, workspace_id, task, kind, status, graph)\n         VALUES ($1, $2, $3, 'run', 'queued', $4)",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Left": [
+        "Uuid",
+        "Uuid",
+        "Text",
+        "Jsonb"
+      ]
+    },
+    "nullable": []
+  },
+  "hash": "fafbe27a2854e8884efec77567bcf258da8d9c1b825b8e8dcfdc2c90efea31b1"
+}