fix: close remaining task 2 review findings

central/app/operational_state.py

@@ -10,8 +10,10 @@ STATES = {
 }
 
 
-def blocker_fingerprint(tenant: str, company: str, product_code: str, field: str, reason_code: str, input_fingerprint: str) -> str:
+def blocker_fingerprint(tenant: str, company: str, product_code: str, field: str, reason_code: str, input_fingerprint: str, installation_id: str | int | None = None) -> str:
     raw = {"tenant": tenant, "company": company, "product_code": product_code, "field": field, "reason_code": reason_code, "input_fingerprint": input_fingerprint}
+    if installation_id is not None:
+        raw["installation_id"] = str(installation_id)
     return hashlib.sha256(json.dumps(raw, sort_keys=True, separators=(",", ":")).encode()).hexdigest()