release: bump version to 0.50.0

backend/app/api/v1/visualization.py

@@ -31,12 +31,15 @@ from app.services.cable_graph import build_graph_from_data, CableGraph, haversin
 from app.services.compute_center_locations import (
     RENDERABLE_PRECISIONS,
     ResolutionDiagnostic,
+    build_compute_center_location_query,
     collect_location_candidates,
     refresh_compute_center_location_cache,
     resolve_compute_center_location_full,
     upsert_compute_center_location,
 )
+from app.services.ai_client import get_ai_provider_client
 from app.services.collectors.bgp_common import RIPE_RIS_COLLECTOR_COORDS
+from app.services.location.llm_fallback import collect_llm_location_fallback_candidate
 from app.services.persistent_logs import record_system_log
 from app.services.vessel_ais_aggregation import (
     build_field_conflict_candidates,
@@ -1864,6 +1867,37 @@ async def collect_compute_center_location(
         country=country,
         record_id=record_id,
     )
+    llm_failure_reason = None
+    if not candidates:
+        query = build_compute_center_location_query(
+            name=name,
+            source=source,
+            source_id=source_id,
+            operator=operator,
+            site=site,
+            organization=organization,
+            city=city,
+            country=country,
+        )
+        try:
+            provider_client = await get_ai_provider_client(db)
+            llm_result = await collect_llm_location_fallback_candidate(
+                provider_client=provider_client,
+                query=query,
+                entity_type="compute_center",
+                attempted_queries=attempted_queries,
+            )
+        except Exception as exc:
+            llm_result = None
+            llm_failure_reason = f"LLM location factcheck unavailable: {exc}"
+            attempted_queries = [
+                *attempted_queries,
+                f"llm_factcheck:compute_center:{name or source_id or 'unknown'}",
+            ]
+        if llm_result is not None:
+            attempted_queries = [*attempted_queries, *llm_result.attempted_queries]
+            candidates = llm_result.candidates
+            llm_failure_reason = llm_result.failure_reason
 
     if not candidates:
         return {
@@ -1877,6 +1911,7 @@ async def collect_compute_center_location(
             ),
             "candidates": [],
             "attempted_queries": list(attempted_queries),
+            "llm_failure_reason": llm_failure_reason,
             "context": {
                 "name": name,
                 "operator": operator,