fix(reconciler): skip escalated / Blocked / Needs-Input tasks in F-1

Reconciler F-1 could not tell "stuck by a lost webhook" from "escalated:
max developer retries reached, waiting for a human". With CI green and a
reviewer that kept sending REQUEST_CHANGES up to the cap, every tick
re-unblocked development -> review -> rollback -> re-unblock (incident
ET-013, infinite bounce: wasted agent runs, Telegram spam, parasitic load
on the shared self-hosting instance).

Add two pre-gate guards in Reconciler._reconcile_gate_task (after the
existing analysis/no-gate/active-job/grace guards, before the gate
pre-evaluation), each an early silent return (no advance, no unblocked_total
increment, no notifications):
- Guard 1 (escalated, deterministic, no network, checked first):
  developer_retry_count(task_id) >= MAX_DEVELOPER_RETRIES. Promote
  stage_engine._developer_retry_count to public developer_retry_count
  (single source of truth; private alias kept). Limit from the constant,
  not a literal 3.
- Guard 2 (explicit human Plane gate, Variant A, no DB migration): new
  never-raise plane_sync.fetch_issue_state + Reconciler._is_blocked_or_needs_input;
  any error/None/unresolved project -> conservative skip. New sub-flag
  ORCH_RECONCILE_SKIP_BLOCKED_ENABLED mutes only the networked Guard 2.

F-2 unchanged: Blocked/Needs Input are outside {in_progress, approved,
rejected} so they are never replayed (regression test added). DB schema,
STAGE_TRANSITIONS, QG_CHECKS, never-raise, analysis carve-out and
kill-switches untouched.

Refs: ORCH-060

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.env.example

@@ -95,9 +95,14 @@ ORCH_IMAGE_FRESHNESS_REPOS=
 #   GRACE_DEFAULT_S    -> default "stuck" threshold on tasks.updated_at (seconds).
 #   GRACE_OVERRIDES_JSON -> per-stage thresholds, e.g. {"development":300}; bad JSON -> default.
 #   NOTIFY_UNBLOCK     -> send a Telegram message when a stuck task is unblocked.
+#   SKIP_BLOCKED_ENABLED -> ORCH-060 F-1 Guard 2: skip reconciling issues a human moved
+#                        to Blocked / Needs Input (per-candidate Plane state lookup).
+#                        false mutes ONLY the networked Guard 2; Guard 1 (escalated by
+#                        developer retries, local+deterministic) is always active.
 ORCH_RECONCILE_ENABLED=true
 ORCH_RECONCILE_PLANE_ENABLED=true
 ORCH_RECONCILE_INTERVAL_S=120
 ORCH_RECONCILE_GRACE_DEFAULT_S=600
 ORCH_RECONCILE_GRACE_OVERRIDES_JSON=
 ORCH_RECONCILE_NOTIFY_UNBLOCK=true
+ORCH_RECONCILE_SKIP_BLOCKED_ENABLED=true