refactor(db)!: adopt project-routed pooled databases

Reorganize WNDB by responsibility and remove legacy scheme endpoints.\n\nRoute analysis and time-series access through project pools, preserve transactional realtime replacement, and refresh GIS materialized views after writes.\n\nAdd database architecture documentation, live pooling coverage, API contract updates, and executable container verification.\n\nBREAKING CHANGE: legacy scheme APIs and flat app.native.wndb module imports are removed.

tests/api/test_project_endpoints.py

@@ -42,11 +42,10 @@ def _load_project_module(monkeypatch):
             "read_inp": lambda network, inp: True,
             "dump_inp": lambda network, inp: True,
             "get_all_vertices": lambda network: [],
-            "get_all_scada_elements": lambda network: [],
+            "get_all_scada_info": lambda network: [],
             "get_all_district_metering_areas": lambda network: [],
             "get_all_service_areas": lambda network: [],
             "get_all_virtual_districts": lambda network: [],
-            "get_extension_data": lambda network, key: None,
             "convert_inp_v3_to_v2": lambda inp: DummyChangeSet({"inp": inp}),
         },
     )
@@ -55,16 +54,6 @@ def _load_project_module(monkeypatch):
         "app.auth.project_dependencies",
         {"get_metadata_repository": lambda: None},
     )
-    install_stub(
-        monkeypatch,
-        "app.infra.db.postgresql.database",
-        {"get_database_instance": lambda network: None},
-    )
-    install_stub(
-        monkeypatch,
-        "app.infra.db.timescaledb.database",
-        {"get_database_instance": lambda network: None},
-    )
     return load_module_from_path(
         "tests_project_endpoints_module",
         "app/api/v1/endpoints/project.py",
@@ -109,16 +98,12 @@ def test_project_info_returns_project_workspace(monkeypatch):
     assert "geoserver" not in payload
 
 
-def test_open_project_returns_network_even_when_db_connection_fails(monkeypatch):
+def test_open_project_uses_unified_wndb_connection_path(monkeypatch):
     module = _load_project_module(monkeypatch)
     called = []
 
     monkeypatch.setattr(module, "open_project", lambda network: called.append(network))
 
-    async def failing_get_pg_db(network):
-        raise RuntimeError("db down")
-
-    monkeypatch.setattr(module, "get_pg_db", failing_get_pg_db)
     client = TestClient(build_test_app(module.router, "/api/v1"))
 
     response = client.post("/api/v1/projects/current", params={"network": "demo"})