feat: prepare ARR for controlled public deployment

prompts/arr_opera_daily_processing_request.schema.json

@@ -0,0 +1,38 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "title": "ARR Opera daily processing request",
+  "type": "object",
+  "additionalProperties": false,
+  "required": [
+    "contract_version",
+    "job_id",
+    "attempt_no",
+    "source_file_id",
+    "processor_version",
+    "rule_set_sha256"
+  ],
+  "properties": {
+    "contract_version": {
+      "type": "string",
+      "const": "arr-opera-daily-request-1"
+    },
+    "job_id": { "$ref": "#/$defs/opaqueId" },
+    "attempt_no": { "type": "integer", "minimum": 1, "maximum": 9999 },
+    "source_file_id": { "$ref": "#/$defs/opaqueId" },
+    "processor_version": {
+      "type": "string",
+      "pattern": "^[A-Za-z0-9][A-Za-z0-9._+-]{0,63}$"
+    },
+    "rule_set_sha256": { "$ref": "#/$defs/sha256" }
+  },
+  "$defs": {
+    "opaqueId": {
+      "type": "string",
+      "pattern": "^[A-Za-z0-9][A-Za-z0-9._:-]{0,127}$"
+    },
+    "sha256": {
+      "type": "string",
+      "pattern": "^[0-9a-f]{64}$"
+    }
+  }
+}