Document SPC outlook support

docs/internal/normalizers.md

@@ -27,6 +27,7 @@ Current mappings:
 | `raw.nws.forecast_discussion.v1` | `weather.forecast_discussion.v1` |
 | `raw.nws.weatherstories.v1` | `weather.weather_story.v1` |
 | `raw.nws.alerts.v1` | `weather.alert.v1` |
+| `raw.spc.convective_outlook.v1` | `weather.outlook.v1` |
 
 ## Boundaries
 
@@ -54,9 +55,18 @@ Weatherfeeder registers normalizers in a stable order:
 1. NWS
 2. Open-Meteo
 3. OpenWeather
+4. SPC
 
 The current normalizers avoid ambiguous matches by using schema equality.
 
+The SPC outlook normalizer decodes the raw multi-document bundle, maps each
+GeoJSON feature to a canonical outlook, and enriches all outlooks for a day with
+the matching print-page headline, summary, and discussion. It preserves compact
+GeoJSON feature geometry and computes `containsLocation` with
+`internal/geo.ContainsPoint` using the source-configured point. Boundary points
+count as contained, and all polygons are preserved whether or not they contain
+the point.
+
 ## State
 
 Normalizers should be stateless. Shared helpers should be deterministic and free
@@ -78,6 +88,7 @@ to four digits after the decimal point.
 - provider normalizer tests under `internal/normalizers/nws`
 - provider normalizer tests under `internal/normalizers/openmeteo`
 - provider normalizer tests under `internal/normalizers/openweather`
+- provider normalizer tests under `internal/normalizers/spc`
 - common helper tests under `internal/normalizers/common`
 
 ## Invariants