refactor: merge scripts/test/ into tests/verification/

Move 21 standalone verification scripts from scripts/test/ to
tests/verification/. These are run-manually scripts that hit live
services (not pytest suites). Consolidates all test-related files
under tests/ with clear separation:
- tests/cli/, tests/unit/, tests/integration/, etc. = pytest suites
- tests/verification/ = standalone verification scripts

tests/verification/test_tx_model.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+"""
+Test the Transaction model directly
+"""
+
+# Test creating a transaction model instance
+tx_data = {
+    "tx_hash": "0xtest123",
+    "sender": "0xsender",
+    "recipient": "0xrecipient",
+    "payload": {"test": "data"}
+}
+
+print("Transaction data:")
+print(tx_data)
+
+# Simulate what the router does
+print("\nExtracting fields:")
+print(f"tx_hash: {tx_data.get('tx_hash')}")
+print(f"sender: {tx_data.get('sender')}")
+print(f"recipient: {tx_data.get('recipient')}")