fix: harden Structural S/R after OHLCV writes and surface cleanup failures

Honor custom S/R tolerance as a transient detect, refresh levels after OHLCV
mutations without failing committed price writes, report per-ticker S/R
rebuild failures from admin cleanup, and warn in the admin UI when refresh is partial.

app/routers/ingestion.py

@@ -19,6 +19,7 @@ from app.dependencies import get_db, require_access
 from app.exceptions import ProviderError
 from app.models.ohlcv import OHLCVRecord
 from app.models.settings import IngestionProgress
+from app.models.sr_level import SRLevel
 from app.models.ticker import Ticker
 from app.models.user import User
 from app.providers.alpaca import AlpacaOHLCVProvider
@@ -105,8 +106,13 @@ async def fetch_symbol(
                 await db.execute(
                     delete(IngestionProgress).where(IngestionProgress.ticker_id == ticker_obj.id)
                 )
+                # Drop Structural S/R with the bars; a failed re-fetch must not
+                # leave zones computed from deleted history.
+                await db.execute(
+                    delete(SRLevel).where(SRLevel.ticker_id == ticker_obj.id)
+                )
                 await db.commit()
-                logger.info("force_refetch: cleared OHLCV and progress for %s", symbol_upper)
+                logger.info("force_refetch: cleared OHLCV, S/R, and progress for %s", symbol_upper)
         except Exception as exc:
             logger.error("force_refetch cleanup failed for %s: %s", symbol_upper, exc)
 

app/routers/sr_levels.py

@@ -74,7 +74,11 @@ async def read_sr_levels(
         None,
         ge=0,
         le=0.1,
-        description="Merge tolerance as fraction of price; omit for ATR-adaptive default",
+        description=(
+            "Merge tolerance as fraction of price. Omit to return persisted levels "
+            "(ATR-adaptive at last recalculation). When set, returns a transient "
+            "detect with this tolerance (not written to the DB)."
+        ),
     ),
     max_zones: int = Query(6, ge=0, description="Max S/R zones to return (default 6)"),
     _user=Depends(require_access),