Tasks: monitor a pull request's CI and heal its failing checks

Task list

[x] A1: red tests for pr checks. Client, core, CLI, integration and MCP tests, failing before the change. Req: R1, R2 · Test: T1–T6.
[x] A2: the client method. GitHubClient.job_log_tail and _download_tail, and the fake's counterpart. Req: R1.4, R1.5 · Test: T1. Deps: A1.
[x] A3: the core verb. github_ops.pull_request_checks, startup_failure in _FAILED_CONCLUSIONS. Req: R1 · Test: T2, T3. Deps: A2.
[x] A4: every seam. CLI subcommand, route, API facade, manager facade, MCP tool, OpenAPI contract. Req: R2 · Test: T4–T6. Deps: A3.
[x] B1: red tests for the gate. test_cimonitor.py and test_ci_autofix_integration.py. Req: R3, R4 · Test: T7, T8.
[x] B2: cimonitor.py. classify, CiBudget, render_section. Req: R3, R4 · Test: T7. Deps: B1.
[x] B3: wire the gate. RoutingConfig.ci, the gate in Dispatcher.handle, RoutedEvent.ci_note, _render_prompt, settled outcomes, event catalogue. Req: R3, R4 · Test: T8. Deps: B2.
[x] B4: configuration. Schema (both copies), routing options page, template config if it lists routing keys. Req: R3.3, R4.3 · Test: T9. Deps: B3.
[x] C1: skill text. reference/workflow.md § Self-healing CI, SKILL.md, reference/automation.md, /the-loop:work-on. Req: R5. Deps: A3, B3.
[x] C2: docs and evidence. CLI reference, capability docs (cli.md, control-plane.md, webhook-triggers.md), the evidence files. Deps: A4, B4, C1.
[x] D1: CI on the poll ingress (review ask). polling.ci config, schema and docs; PollProvider.ci_events and its GitHub implementation; Poller._poll_ci with the ciSeen ledger; poll.cycle's ci_forwarded; test_poll_ci.py. Req: R6 · Test: T13. Deps: B3.