P3 backend: files, skills, routines, claw chat with LIVE taint plumbing

- tc-files: BlobStore trait + LocalBlobStore (traversal-proof keys); wired
  through Runtime (config storage.data_dir in deployments)
- File tools: files.write/files.list (workspace-internal) + files.delete
  (gated FileDeletion — tested: file survives pending, gone after approve);
  GET /api/openclaw/files + /api/shared-drive/files (drive/agent scoped)
- Skills: catalog/library + idempotent install with counter, uninstall;
  GET /api/skills[?clawId=], POST install/uninstall
- tc-scheduler: croner cron math (clock-controlled tests), SKIP LOCKED
  claim-and-advance firing REAL runs into dedicated '⏰ name' sessions
  (reused, exactly-once), paused routines skipped; routines API + agent
  tool routine.schedule; loop spawned in server
- Claw chat: 1:1 threads, chat.send enforcing the target's Other-Claws
  policy, chat.inbox whose output carries inter_agent taint; the run loop
  now ACCUMULATES taint from tool outputs into LoopState, classifies with
  it, and stamps steps + approvals — a poisoned inbox followed by
  email.send produces an approval whose taint_sources says inter_agent
- ScriptedProvider scenario selection now keys on the most recent marker
  (session history kept earlier markers alive)

132 Rust tests green.

Co-Authored-By: Claude Fable 5 <[email protected]>

.sqlx/query-941a6fb3447c17170ce6af2ec7b3e3ba9e0136310502413edbeeb96054f9e664.json

@@ -0,0 +1,21 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "INSERT INTO file_nodes\n            (id, workspace_id, agent_id, drive, path, kind, size, blob_ref,\n             owner_kind, owner_id)\n         VALUES ($1, $2, $3, $4, $5, 'file', $6, $7, 'agent', $8)\n         ON CONFLICT (workspace_id, drive,\n                      COALESCE(agent_id, '00000000-0000-0000-0000-000000000000'::uuid),\n                      path)\n         DO UPDATE SET size = $6, blob_ref = $7",
+  "describe": {
+    "columns": [],
+    "parameters": {
+      "Left": [
+        "Uuid",
+        "Uuid",
+        "Uuid",
+        "Text",
+        "Text",
+        "Int8",
+        "Text",
+        "Uuid"
+      ]
+    },
+    "nullable": []
+  },
+  "hash": "941a6fb3447c17170ce6af2ec7b3e3ba9e0136310502413edbeeb96054f9e664"
+}