Document SPC outlook support

docs/internal/postgres-sink.md

@@ -19,6 +19,7 @@ Inputs are canonical feed events. The mapper currently handles these schemas:
 - `weather.forecast_discussion.v1`
 - `weather.weather_story.v1`
 - `weather.alert.v1`
+- `weather.outlook.v1`
 
 Outputs are feedkit `PostgresWrite` values for weatherfeeder-owned tables.
 Unsupported schemas produce no writes and no error.
@@ -80,6 +81,7 @@ Child rows use positional indexes to preserve canonical array order:
 - `story_index`
 - `alert_index`
 - `reference_index`
+- `outlook_index`
 
 Required canonical fields are validated before writes are returned:
 
@@ -89,10 +91,14 @@ Required canonical fields are validated before writes are returned:
 - forecast discussions require `issuedAt` and `product`;
 - weather story runs require `asOf`, and each story requires `startTime`,
   `endTime`, and `updatedAt`;
-- alert runs require `asOf`, and each alert requires `id`.
+- alert runs require `asOf`, and each alert requires `id`;
+- outlook runs require `asOf`, and each outlook requires `id`, `provider`,
+  `product`, `day`, `outlookType`, `label`, `validFrom`, `validTo`, `issuedAt`,
+  `expiresAt`, and `geometry`.
 
 Nullable canonical values are converted to SQL nulls by mapper helpers.
-Observation present-weather raw values are stored as compact JSON text.
+Observation present-weather raw values and outlook geometry values are stored as
+compact JSON text.
 
 ## Failure Behavior