Migrate GitHub webhook normalization into github tool (#758)

* Add event-triggered routines and workflow skill templates

* Add generic host-verified webhook ingress for tools

* Migrate GitHub webhook normalization into github tool

* Bump github tool registry version

* Stabilize trace E2E test rig and approval behavior

* Add reusable gateway workflow harness with mock LLM server (#762)

* Add reusable gateway workflow test harness with mock LLM server

* Fix clippy issues in workflow harness

* Stabilize trace E2E test rig and approval behavior

* Address PR review feedback on gateway workflow harness

- Extract shared TestChannelHandle into test_channel.rs with name override
  support, eliminating ~55 lines of duplication between test_rig.rs and
  gateway_workflow_harness.rs
- Remove redundant RoutineEngine creation that was immediately overwritten
  by Agent::run()
- Replace flaky sleep(500ms) with polling loop for routine run count check
- Use components.context_manager instead of creating a fresh ContextManager
  for job tools, ensuring agent and tools share the same instance

Co-Authored-By: Claude Opus 4.6 <[email protected]>

* Fix import ordering in gateway_workflow_harness

Co-Authored-By: Claude Opus 4.6 <[email protected]>

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Co-authored-by: Claude Opus 4.6 <[email protected]>

* Address PR #758 review feedback

- Fix header_value to use fully case-insensitive lookup (iterate with
  to_ascii_lowercase) instead of checking only exact/lower/upper variants
- Change comment_id from u32 to u64 to handle GitHub's billion-range IDs
- Remove handle_webhook from LLM-facing JSON schema to prevent direct
  invocation bypassing HMAC verification
- Rename enrichment keys from repository/sender to repository_name/
  sender_login to preserve original JSON objects in webhook payloads
- Remove put_string_normalized helper (no longer needed)
- Replace no-op tests (test_validate_event_in_create_pr_review,
  test_validate_merge_method) with test_header_value_case_insensitive
- Add README docs for 6 undocumented actions (list_issue_comments,
  create_issue_comment, list_pull_request_comments,
  reply_pull_request_comment, get_pull_request_reviews,
  get_combined_status)
- Add comment explaining max_tool_calls <= 8 bound in e2e test
- Fix gateway workflow harness: add webhook_capability with secret auth
  to MockGithubWebhookTool, matching staging's hardened webhook security
- Fix merge artifacts: remove duplicate test function, orphaned code
  fragment in e2e_routine_heartbeat

[skip-regression-check]

Co-Authored-By: Claude Opus 4.6 <[email protected]>

* Fix formatting in gateway workflow harness

Co-Authored-By: Claude Opus 4.6 <[email protected]>

* Address Copilot review: filter keys, pr_number fallback, feature gate, version alignment

- Update SKILL.md and workflow-routines.md templates to use `repository_name`
  and `sender_login` (matching enriched payload field names)
- Mark webhook HMAC secret as required in SKILL.md prerequisites
- Fall back to `/issue/number` for `pr_number` on issue_comment PR webhooks
- Gate `gateway_workflow_harness` module behind `#[cfg(feature = "libsql")]`
- Align tool version to 0.2.1 in Cargo.toml and capabilities.json

Co-Authored-By: Claude Opus 4.6 <[email protected]>

---------

Co-authored-by: Claude Opus 4.6 <[email protected]>

registry/tools/github.json

@@ -2,7 +2,7 @@
   "name": "github",
   "display_name": "GitHub",
   "kind": "tool",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "wit_version": "0.3.0",
   "description": "GitHub integration for issues, PRs, repos, and code search",
   "keywords": [