Refactor tests for execution plan and add comprehensive storage tests

- Updated `TestModuleSingletons` in `test_execution_plan.py` to reflect new agent templates and playbook names.
- Changed assertions in playbook tests to match updated templates and agents.
- Introduced `test_storage.py` to cover the storage layer, including encryption, BlobStore, and VectorStore functionalities.
- Added tests for S3 interactions, ensuring upload, download, delete, and list operations work as expected.
- Implemented mock tests for Pinecone and Qdrant vector stores to validate upsert, search, and delete operations.

app/schemas.py

@@ -82,3 +82,76 @@ class BackupMetadata(BaseModel):
     timestamp: int
     checksum: str
     chunk_count: int
+
+
+# ── Cloud Storage (E2E encrypted blobs) ──────────────────────────────
+
+class StorageRecord(BaseModel):
+    id: str
+    user_id: str
+    table: str
+    blob: bytes
+    checksum: str
+    created_at: int
+    updated_at: int
+
+
+class StorageRecordCreate(BaseModel):
+    table: str
+    blob: bytes
+    checksum: str
+
+
+class StorageRecordUpdate(BaseModel):
+    blob: bytes
+    checksum: str
+
+
+# ── Cloud Vector Store (E2E encrypted vectors) ────────────────────────
+
+class VectorItem(BaseModel):
+    id: str
+    blob: bytes   # encrypted vector + metadata — backend never decrypts
+    checksum: str
+
+
+class VectorUpsertRequest(BaseModel):
+    vectors: list[VectorItem]
+
+
+class VectorSearchRequest(BaseModel):
+    query_blob: bytes   # encrypted query — backend never decrypts
+    top_k: int = 10
+
+
+class VectorSearchResult(BaseModel):
+    id: str
+    score: float
+    blob: bytes
+
+
+class VectorSearchResponse(BaseModel):
+    results: list[VectorSearchResult]
+
+
+# ── Plugin Marketplace ────────────────────────────────────────────────
+
+class PluginManifest(BaseModel):
+    id: str
+    name: str
+    description: str
+    version: str
+    author: str
+    permissions: list[str]
+    category: str
+    price_cents: int = 0
+
+
+class PluginListResponse(BaseModel):
+    plugins: list[PluginManifest]
+    total: int
+    page: int
+
+
+class PluginInstallRequest(BaseModel):
+    plugin_id: str