feat(1e): HC3 additive generic + op/assertion split (orchestrator owns the op)

- orchestrator: per mutating tier, run optional pre-op seed hook (ops.py pre_<op>) → perform the op
  ONCE (harness-owned) → run generic assertion (unless opted out) AND overlay assertion, both against
  the shared post-op deployment. Op results passed op→assertion via run-scoped CCCI_OP_STATE_FILE.
- opt-out: CCCI_SKIP_GENERIC / CCCI_SKIP_GENERIC_<OP> / recipe_meta.SKIP_GENERIC (declarative).
- generic.py: split do_* into op primitives (perform_upgrade/backup/restore) + assertions
  (assert_upgraded/backup_artifact/restore_healthy) reading op_state(); deployed_identity now returns
  {version,image,chaos} (chaos label ready for HC1).
- generic test_<op>.py + all 6 recipe overlays migrated to assertion-only; pre-op seeding moved to
  per-recipe ops.py (pre_upgrade/pre_backup/pre_restore). install overlays unchanged (no op).
- deploy-count stays 1 (op primitives never call deploy_app). lint PASS; 8 unit tests PASS on cc-ci.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/_generic/test_upgrade.py

@@ -1,9 +1,10 @@
-"""Generic UPGRADE tier (Phase 1d DG2) — recipe-agnostic.
+"""Generic UPGRADE tier (Phase 1d DG2 + Phase 1e HC3) — recipe-agnostic, assertion-only.
 
-The orchestrator deployed the PREVIOUS published version once; this tier upgrades it IN PLACE
-(abra app upgrade) to the target (VERSION env, else newest published) on the same live deployment,
-then asserts it reconverges and still serves. Data-continuity is a recipe overlay (test_upgrade.py),
-not the generic — the generic verifies the upgrade mechanism + still-serving."""
+The orchestrator deployed the base version once and performed the upgrade ONCE in place (Phase 1e
+HC1: to the PR-head code under test via `abra app deploy --chaos`), recording the pre-upgrade
+identity in the run-scoped op state. This tier ASSERTS the upgrade reconverged, still serves, and
+actually MOVED the deployment (version/image/chaos label) — it does NOT perform the op. Runs by
+default ALONGSIDE any recipe overlay (additive); skipped only via an explicit opt-out."""
 
 import os
 import sys
@@ -13,5 +14,4 @@ from harness import generic  # noqa: E402
 
 
 def test_upgrade_reconverges(live_app, meta):
-    target = os.environ.get("VERSION") or None
-    generic.do_upgrade(live_app, target, meta)
+    generic.assert_upgraded(live_app, meta)