feat(tools): add minio prefix sync into memory

docs/plans/state.json

@@ -80,6 +80,25 @@
       ],
       "test_status": "pnpm test:run src/tools/builtin/minio-ingest.test.ts src/tools/policy.test.ts + pnpm typecheck passing"
     },
+    "minio-prefix-sync-tool": {
+      "status": "completed",
+      "date": "2026-02-16",
+      "updated": "2026-02-16",
+      "summary": "Added `minio.sync` tool to recursively ingest MinIO prefixes into nested memory namespaces with per-run object limits, per-object content limits, extension/content safety checks, and summary output. Registered tool with MinIO+memory runtime, expanded `group:minio` policy coverage, and updated docs/tests.",
+      "files_modified": [
+        "src/tools/builtin/minio-sync.ts",
+        "src/tools/builtin/minio-sync.test.ts",
+        "src/tools/builtin/index.ts",
+        "src/tools/index.ts",
+        "src/daemon/index.ts",
+        "src/tools/policy.ts",
+        "src/tools/policy.test.ts",
+        "README.md",
+        "docs/api/TOOLS.md",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run src/tools/builtin/minio-sync.test.ts src/tools/policy.test.ts + pnpm typecheck passing"
+    },
     "backup-session-summary-audit-trail": {
       "status": "completed",
       "date": "2026-02-16",