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-218d034c2d6e1ea97efd61cc3943e996c6e23b51a3cb94654481207432a9e04a.json

@@ -0,0 +1,58 @@
+{
+  "db_name": "PostgreSQL",
+  "query": "SELECT id, workspace_id, title, author, description, body, installs\n           FROM skills\n           WHERE workspace_id IS NULL OR workspace_id = $1\n           ORDER BY installs DESC, title",
+  "describe": {
+    "columns": [
+      {
+        "ordinal": 0,
+        "name": "id",
+        "type_info": "Uuid"
+      },
+      {
+        "ordinal": 1,
+        "name": "workspace_id",
+        "type_info": "Uuid"
+      },
+      {
+        "ordinal": 2,
+        "name": "title",
+        "type_info": "Text"
+      },
+      {
+        "ordinal": 3,
+        "name": "author",
+        "type_info": "Text"
+      },
+      {
+        "ordinal": 4,
+        "name": "description",
+        "type_info": "Text"
+      },
+      {
+        "ordinal": 5,
+        "name": "body",
+        "type_info": "Text"
+      },
+      {
+        "ordinal": 6,
+        "name": "installs",
+        "type_info": "Int4"
+      }
+    ],
+    "parameters": {
+      "Left": [
+        "Uuid"
+      ]
+    },
+    "nullable": [
+      false,
+      true,
+      false,
+      false,
+      false,
+      false,
+      false
+    ]
+  },
+  "hash": "218d034c2d6e1ea97efd61cc3943e996c6e23b51a3cb94654481207432a9e04a"
+}