feat: support platform and model info in nostr lock events

This change enables agents to report their execution platform (e.g., Jules, Codex, Goose) and model (e.g., DeepSeek 3.2) in the Nostr lock events.

Key changes:
- Updated `torch-lock` CLI to accept `--platform` and `--model` arguments.
- Implemented `detectPlatform` utility to infer platform from environment variables if not provided.
- Updated `src/lib.mjs` to include these fields in the event content.
- Updated `scripts/agent/run-scheduler-cycle.mjs` to propagate `--model` and `AGENT_MODEL`.
- Updated `dashboard/index.html` to display the model information on the lock card.
- Fixed a regression in `scripts/validate-scheduler-flow-parity.mjs` and `test/scheduler-ratchet.test.mjs` caused by argument string matching.
- Deleted `repro_test.mjs` temporary file.

Co-authored-by: PR0M3TH3AN <[email protected]>

scripts/validate-scheduler-flow-parity.mjs

@@ -43,7 +43,7 @@ const invariants = [
       ],
     },
     schedulerSnippets: [
-      "runCommand('npm', ['run', `lock:check:${cadence}`])",
+      "runCommand('npm', ['run', `lock:check:${cadence}`",
       'checkPayload.excluded',
       'checkPayload.locked',
       'checkPayload.paused',