Add agent_team.transport.checker_intake: turn a confirmed, at/above-threshold
Plane-1 checker FINDING into one Plane-2 pipeline remediation task via the
committed coordinator intake entry (start_task), mirroring github_intake.
- select_findings: status==confirmed AND severity>=threshold (default high);
unverified/suppressed/below-threshold dropped; unknown threshold rejected.
- finding_identity: stable de-dup key (finding id, else content-hash). In-memory
set, best-effort, NOT durable across restart (ledger table is the follow-up).
- finding_task_text/_sanitize: every repo-controlled field (title, proof, repo)
is newline/control-char neutralised and length-bounded before it reaches the
task text or operator log (log-injection hygiene).
- load_report_findings/ingest_reports: read the exact checker report JSON shape
(top-level object with findings[]; bare array and dir-of-*.json also accepted).
28 hermetic unit tests (stub coordinator, in-memory findings / temp reports).
