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/matrix-synapse/test_backup.py

@@ -1,16 +1,15 @@
-"""matrix-synapse — BACKUP overlay (Phase 1d, DG4): seed a postgres marker, back it up (the recipe's
-pg_backup.sh pre-hook dumps the DB to backup.sql; assert a snapshot artifact), then mutate (drop the
-marker) so the RESTORE overlay (test_restore.py) can prove the backed-up state returns. Runs on the
-shared deployment; the mutated state persists for the restore tier.
+"""matrix-synapse — BACKUP overlay (Phase 1e HC3): assertion-only + additive.
 
-This exercises the real DB-dump backup hook (backupbot.backup.pre-hook / restore.post-hook), not a
-plain volume copy — the meaningful data path for a postgres-backed app."""
+ops.pre_backup wrote "original" into postgres before the backup op (pg_backup.sh dumps the DB); the
+orchestrator performed the backup once (generic tier asserted a snapshot artifact). This overlay
+ADDS: the seeded row is intact at backup time. The backup→restore divergence (dropping the table) is
+in ops.pre_restore."""
 
 import os
 import sys
 
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "..", "runner"))
-from harness import generic, lifecycle  # noqa: E402
+from harness import lifecycle  # noqa: E402
 
 
 def _psql(domain, sql):
@@ -18,23 +17,7 @@ def _psql(domain, sql):
     return lifecycle.exec_in_app(domain, ["sh", "-c", cmd], service="db").strip()
 
 
-def test_backup_captures_state(live_app, meta):
-    domain = live_app
-
-    # 1) establish original state in postgres, then back up (reuse the generic op: backup +
-    #    assert a snapshot artifact; pg_backup.sh dumps the DB)
-    _psql(
-        domain,
-        "CREATE TABLE IF NOT EXISTS ci_marker(v text); DELETE FROM ci_marker; "
-        "INSERT INTO ci_marker VALUES('original');",
-    )
-    assert _psql(domain, "SELECT v FROM ci_marker;") == "original"
-    snap = generic.do_backup(domain)
-    assert snap, "backup produced no snapshot artifact"
-
-    # 2) mutate: drop the marker table (diverge from the backup)
-    _psql(domain, "DROP TABLE ci_marker;")
-    assert _psql(domain, "SELECT to_regclass('public.ci_marker');") in (
-        "",
-        "NULL",
-    ), "drop did not take"
+def test_backup_captures_state(live_app):
+    assert (
+        _psql(live_app, "SELECT v FROM ci_marker;") == "original"
+    ), "the seeded postgres state was not present at backup time"