verify(P3): dead-code-and-stale-prefix-cleanup — 4-layer verify PASS + ship

VERIFY: structural — dead export + stale comments + prefixes gone; behavioral — 616 tests + CI PASS; quality — env-override test updated.

---ci---
project: acdl
phase: 3
milestone: v1.16
status: complete
phase_role: execution
requirements:
  covered: [REQ-167]
  partial: []
---/ci---

core/local_emulators.py

@@ -13,7 +13,8 @@ evidence event) runs end-to-end against the local tier with no AWS:
 Each adapter exposes the same interface as the live counterpart so the
 caller code path is unchanged; only the I/O target swaps. Selection is
 gated on the NOVA_LOCAL_TIER env var (set by run_platform.sh --local).
-Dual-read via core/env.py: NOVA_* preferred, ACDL_* fallback until P5.
+Env vars read via core/env.py (NOVA_* only; the ACDL_* fallback was
+removed in v1.15 P5, REQ-164).
 """
 
 from __future__ import annotations
@@ -68,7 +69,7 @@ class FlatFileOutbox:
 
     @classmethod
     def create(cls, dir: Optional[Path] = None) -> "FlatFileOutbox":
-        d = Path(dir) if dir else Path(tempfile.mkdtemp(prefix="acdl_outbox_"))
+        d = Path(dir) if dir else Path(tempfile.mkdtemp(prefix="nova_outbox_"))
         d.mkdir(parents=True, exist_ok=True)
         out = cls(dir=d)
         # Re-read the chain tail if the file already exists.
@@ -249,7 +250,7 @@ class LocalS3StateBackend:
 
     @classmethod
     def create(cls, dir: Optional[Path] = None) -> "LocalS3StateBackend":
-        d = Path(dir) if dir else Path(tempfile.mkdtemp(prefix="acdl_tfstate_"))
+        d = Path(dir) if dir else Path(tempfile.mkdtemp(prefix="nova_tfstate_"))
         d.mkdir(parents=True, exist_ok=True)
         return cls(state_dir=d)
 
@@ -499,9 +500,8 @@ def run_local_e2e(contract_path: str, repo_root: Optional[Path] = None) -> Dict[
 
 if __name__ == "__main__":
     contract = sys.argv[1] if len(sys.argv) > 1 else "contracts/microservice.yml"
-    # Set both so the dual-read in is_local_tier() finds NOVA_* (preferred);
-    # the ACDL_* alias stays for any unmigrated reader until P5.
+    # Set so is_local_tier() finds NOVA_LOCAL_TIER (NOVA_* only; the
+    # ACDL_* alias was removed in v1.15 P5, REQ-164).
     os.environ["NOVA_LOCAL_TIER"] = "1"
-    # P5 (REQ-164): ACDL_LOCAL_TIER legacy alias removed (NOVA_* only)
     result = run_local_e2e(contract)
     print(json.dumps(result, indent=2))