feat(server): integrate MCP queries and investigation messaging

Add project-bound OAuth MCP queries and controlled analysis with scoped evidence,
limits, timeouts and a nearby-model spatial query using EPSG:4326 inputs.
Default nearby searches to 200 meters and five results.

Integrate investigation messaging/presentation, health/readiness and typed history;
remove duplicate web search and fix online simulation and compressed baseline writes.
Include project migrations 023-025; keep local credentials and demo seeding excluded.

Validation: 319 focused pytest checks; real PostGIS temporary-table regression;
read-only Jinqian bridge radius comparison; cross-language MCP discovery/calls.

tests/integration/test_operational_tasks_storage.py

@@ -66,6 +66,8 @@ async def test_postgres_task_artifacts_approval_and_project_isolation_roll_back(
             ).fetchall()
             assert len(comment_rows) >= 17
             assert all(row["description"] for row in comment_rows)
+            messages_migration = (Path(__file__).parents[2] / "resources/sql/024_agent_messages.sql").read_text()
+            await conn.execute(messages_migration.replace("\nBEGIN;", "").replace("\nCOMMIT;", ""))
             repository = OperationalTaskRepository(conn, context.project_id)
             service = OperationalTaskService(repository, context, permissions_for_context(context))
             now = datetime.now(timezone.utc)