release: bump version to 0.58.0

Release 0.58.0 includes the Earth high-precision boundary PMTiles/MVT pipeline, standardized Earth boundary source collectors, China POV boundary configuration templates, and removal of the legacy low-precision GeoJSON fallback. It also adds Earth news target-location queueing/archive support, fixes datasource task status visibility, documents the Earth surface depth-spacing rules that prevent far-zoom z-fighting snow/black blocks, and updates bilingual operations/developer docs.

backend/app/main.py

@@ -18,6 +18,10 @@ from app.services.scheduler import (
     stop_scheduler,
     sync_scheduler_with_datasources,
 )
+from app.services.earth_news_worker import (
+    start_earth_news_target_worker,
+    stop_earth_news_target_worker,
+)
 
 
 configure_logging()
@@ -53,7 +57,9 @@ async def lifespan(app: FastAPI):
     start_scheduler()
     await sync_scheduler_with_datasources()
     broadcaster.start()
+    start_earth_news_target_worker()
     yield
+    await stop_earth_news_target_worker()
     broadcaster.stop()
     stop_scheduler()