Cron: enforce cron-owned delivery contract (#40998)

Merged via squash.

Prepared head SHA: 5877389e33
Co-authored-by: mbelinky <132747814+mbelinky@users.noreply.github.com>
Co-authored-by: mbelinky <132747814+mbelinky@users.noreply.github.com>
Reviewed-by: @mbelinky

docs/cli/cron.md

@@ -30,6 +30,12 @@ Note: retention/pruning is controlled in config:
 - `cron.sessionRetention` (default `24h`) prunes completed isolated run sessions.
 - `cron.runLog.maxBytes` + `cron.runLog.keepLines` prune `~/.openclaw/cron/runs/<jobId>.jsonl`.
 
+Upgrade note: if you have older cron jobs from before the current delivery/store format, run
+`openclaw doctor --fix`. Doctor now normalizes legacy cron fields (`jobId`, `schedule.cron`,
+top-level delivery fields, payload `provider` delivery aliases) and migrates simple
+`notify: true` webhook fallback jobs to explicit webhook delivery when `cron.webhook` is
+configured.
+
 ## Common edits
 
 Update delivery settings without changing the message:

docs/cli/doctor.md

@@ -28,6 +28,7 @@ Notes:
 - Interactive prompts (like keychain/OAuth fixes) only run when stdin is a TTY and `--non-interactive` is **not** set. Headless runs (cron, Telegram, no terminal) will skip prompts.
 - `--fix` (alias for `--repair`) writes a backup to `~/.openclaw/openclaw.json.bak` and drops unknown config keys, listing each removal.
 - State integrity checks now detect orphan transcript files in the sessions directory and can archive them as `.deleted.<timestamp>` to reclaim space safely.
+- Doctor also scans `~/.openclaw/cron/jobs.json` (or `cron.store`) for legacy cron job shapes and can rewrite them in place before the scheduler has to auto-normalize them at runtime.
 - Doctor includes a memory-search readiness check and can recommend `openclaw configure --section model` when embedding credentials are missing.
 - If sandbox mode is enabled but Docker is unavailable, doctor reports a high-signal warning with remediation (`install Docker` or `openclaw config set agents.defaults.sandbox.mode off`).