feat(observatory): add laboratory setup preflight

src/k1link/web/app.py

@@ -36,6 +36,7 @@ from k1link.laboratory.m48_raw_evidence import (
     M48RawEvidenceError,
     M48RawEvidenceReader,
 )
+from k1link.observatory import LaboratorySetupRegistry, LaboratorySetupRegistryError
 from k1link.sessions import (
     MaterializedRecording,
     RecordedCameraFrameService,
@@ -190,6 +191,18 @@ LABORATORY_RUNNER = LaboratoryRunner(
 LABORATORY_VALUE_REVIEW_REGISTRY = LaboratoryValueReviewRegistry.from_file(
     REPOSITORY_ROOT / "config" / "laboratory-value-review.json"
 )
+try:
+    OBSERVATORY_LABORATORY_SETUP_REGISTRY = LaboratorySetupRegistry.from_file(
+        REPOSITORY_ROOT / "config" / "observatory-laboratory-setups.json",
+        repository_root=REPOSITORY_ROOT,
+    )
+    OBSERVATORY_LABORATORY_SETUP_REGISTRY_ERROR = None
+except (LaboratorySetupRegistryError, OSError) as exc:
+    # Observatory is an optional observation-only slice. Its configuration must
+    # fail closed locally without preventing K1, Simulation or legacy LAB from
+    # starting.
+    OBSERVATORY_LABORATORY_SETUP_REGISTRY = None
+    OBSERVATORY_LABORATORY_SETUP_REGISTRY_ERROR = str(exc)
 LABORATORY_EVIDENCE_REPORTS = LaboratoryEvidenceReportService(
     LABORATORY_EVIDENCE_REGISTRY,
     lambda: REPOSITORY_ROOT / ".runtime" / "compute-experiments",
@@ -692,7 +705,13 @@ app.include_router(
         point_color_renderers=plugin_environment.point_color_renderers,
     )
 )
-app.include_router(build_observatory_router(session_store))
+app.include_router(
+    build_observatory_router(
+        session_store,
+        setup_registry=OBSERVATORY_LABORATORY_SETUP_REGISTRY,
+        setup_registry_error=OBSERVATORY_LABORATORY_SETUP_REGISTRY_ERROR,
+    )
+)
 app.include_router(
     build_environment_router(root_provider=lambda: session_store.data_dir / "ui-environment")
 )