Add daily generated text assets

docs/internal/generatedtext.md

@@ -9,20 +9,21 @@ This document describes structured generated-text handling in
 generated-text-template reports and builds curated render contexts for
 templates. It also owns the generated-text catalog that connects report
 definitions to validators, render-context builders, schema assets, and template
-assets. The implemented contracts are Today Report, Tomorrow Report, and Hourly
-Report.
+assets. The implemented contracts are Daily validation and asset lookup, Today
+Report, Tomorrow Report, and Hourly Report.
 
 ## Inputs And Outputs
 
 Inputs:
 
-- raw GeneratedText JSON for Today, Tomorrow Report, or Hourly Report
+- raw GeneratedText JSON for Daily, Today, Tomorrow Report, or Hourly Report
 - report metadata from `internal/briefing`
 - a module snapshot from `internal/module`
 - validated generated text
 
 Outputs:
 
+- typed `Daily` generated text
 - typed `Today` generated text
 - typed `Tomorrow` generated text
 - typed `Hourly` generated text
@@ -33,6 +34,20 @@ Outputs:
 - generated-text catalog handlers for report definitions that use
   `generated_text_template`
 
+The Daily generated text JSON accepts the same public fields and validation
+rules as Tomorrow. Its catalog entry is selected through schema ID `daily` and
+template ID `daily`; render-context construction is not implemented until the
+Daily report context exists.
+
+```json
+{
+  "summary": "string",
+  "forecast_discussion": ["string"],
+  "precipitation_timing": "string",
+  "confidence": "string"
+}
+```
+
 The hourly generated text JSON accepts:
 
 ```json
@@ -96,8 +111,8 @@ JSON when blank.
 - Malformed generated-text JSON fails with decode context.
 - Unknown generated-text JSON fields fail during decoding.
 - Empty required fields fail after trimming whitespace.
-- Today and Tomorrow forecast discussion fails when no nonblank paragraphs
-  remain.
+- Daily, Today, and Tomorrow forecast discussion fails when no nonblank
+  paragraphs remain.
 - Missing optional render-context stanzas become nil module pointers.
 - Invalid render metadata, including missing timezone, missing generated time,
   or invalid valid period, fails before template rendering.
@@ -109,6 +124,7 @@ JSON when blank.
 Inspect:
 
 - `internal/generatedtext/hourly_test.go`
+- `internal/generatedtext/daily_test.go`
 - `internal/generatedtext/today_test.go`
 - `internal/generatedtext/tomorrow_test.go`
 - `internal/generatedtext/catalog_test.go`