Add SPC Outlook summaries to the alert digest template

docs/internal/module.md

@@ -225,12 +225,19 @@ validation.
 - `location_name`
 - `outlook_count`
 - `outlooks`
+- `risk_digest`
 
 Each outlook entry may include `day`, `outlook_type`, `label`, `label_text`,
 `period_begins`, `period_ends`, `issued_at`, `contains_location`, and
 `image_url`. It omits GeoJSON geometry, source URL, expiration time, and
 severity rank.
 
+The optional `risk_digest` list is a curated report-rendering subset of
+categorical outlooks that overlap the report period, contain the configured
+location, and meet the minimum severity threshold. Entries include `label_text`,
+`risk_label`, `period_begins`, and `period_ends`; they do not expose severity
+rank.
+
 `spc_convective_discussion` emits a narrative stanza only when a retained
 report-period categorical outlook has severity rank `3` or higher and matching
 discussion text is available. Its output includes `included_because` and