Add Daily prompt input preflight

docs/cli.md

@@ -1,17 +1,19 @@
 # Weatherreporter CLI
 
-`weatherreporter generate daily` currently writes a Daily briefing JSON artifact.
-Other report generation and scheduled runs still resolve configuration, report
-definitions, and valid periods, then return a not-implemented error.
+`weatherreporter generate daily` currently writes a Daily prompt input data
+package and runs `scriptorium render` as a preflight check. Other report
+generation and scheduled runs still resolve configuration, report definitions,
+and valid periods, then return a not-implemented error.
 
 ## Shortest Useful Command
 
 ```sh
-weatherreporter generate daily --date 2026-05-29 --out ./daily.md
+weatherreporter generate daily --date 2026-05-29 --out ./daily.data_package.json
 ```
 
 The command parses flags, loads configuration, fetches weather data, builds a
-Daily briefing, and writes the JSON artifact to `--out`.
+Daily briefing, writes the `data_package` JSON artifact to `--out`, and invokes
+`scriptorium render --input data_package=<path> --format json`.
 
 ## Command Overview
 
@@ -25,9 +27,11 @@ weatherreporter run morning
 weatherreporter run evening
 ```
 
-`generate daily` writes a briefing JSON artifact. Other `generate` commands
-resolve one report request and stop before report generation. `run` commands
-resolve a scheduled batch request and stop before execution.
+`generate daily` writes a data package JSON artifact, writes the Daily briefing
+snapshot under the configured workspace, and writes the render preflight output
+under the configured workspace. Other `generate` commands resolve one report
+request and stop before report generation. `run` commands resolve a scheduled
+batch request and stop before execution.
 
 ## Flags
 
@@ -35,7 +39,7 @@ resolve a scheduled batch request and stop before execution.
 - `--config PATH`: load configuration from `PATH` instead of `/usr/local/etc/weatherreporter/config.yml`.
 - `--units VALUE`: override configured Weather API units.
 - `--tz NAME`: override configured Weather API timezone.
-- `--out PATH`: output path for `generate daily`; reserved for later generated report output on other `generate` commands.
+- `--out PATH`: data package output path for `generate daily`; reserved for later generated report output on other `generate` commands.
 - `--date YYYY-MM-DD`: optional date for `generate daily`; defaults to the current local date in the configured timezone.
 - `--start TIME`: required start time for `generate storm`.
 - `--end TIME`: required end time for `generate storm`.