fix(k1): stabilize repeated acquisition and live viewer recovery

src/k1link/web/app.py

@@ -53,8 +53,10 @@ from k1link.web.plugin_runtime import (
     PluginRuntimeUnavailableError,
 )
 from k1link.web.polygon_api import build_polygon_router, configured_polygon_runs_root
+from k1link.web.runtime_diagnostics import configure_scanner_diagnostics
 from k1link.web.session_api import build_session_router
 from k1link.web.system_telemetry_api import build_system_telemetry_router
+from k1link.web.viewer_diagnostics_api import build_viewer_diagnostics_router
 
 REPOSITORY_ROOT = Path(__file__).resolve().parents[3]
 INVALID_REQUEST_DETAIL = "Некорректные параметры запроса."
@@ -274,6 +276,9 @@ async def _recording_preparation_reconciler() -> None:
 async def app_lifespan(_: FastAPI) -> AsyncIterator[None]:
     reconciler: asyncio.Task[None] | None = None
     try:
+        configure_scanner_diagnostics(
+            REPOSITORY_ROOT / ".runtime" / "mission-core" / "logs"
+        )
         session_recording_preparation_manager.start()
         # Recovery is intentionally a one-shot startup phase. The archive
         # helper owns a cross-process lease, while ordinary catalog requests
@@ -671,6 +676,7 @@ app.include_router(
         root_provider=lambda: REPOSITORY_ROOT / ".runtime" / "system",
     )
 )
+app.include_router(build_viewer_diagnostics_router())
 
 
 frontend_dist = REPOSITORY_ROOT / "apps" / "control-station" / "dist"