Refactor Neo4j tests and improve tag handling in Cypher

Replaces outdated Neo4j test setup with a robust TestMain, shared test database, and utility functions for test data and migrations. Improves Cypher generation for processing e-tags, p-tags, and other tags to ensure compliance with Neo4j syntax. Added integration test script and updated benchmark reports for Badger backend.

cmd/benchmark/.claude/settings.local.json

@@ -11,7 +11,12 @@
       "Bash(docker compose:*)",
       "Bash(./run-benchmark.sh:*)",
       "Bash(tee:*)",
-      "Bash(sudo rm:*)"
+      "Bash(sudo rm:*)",
+      "Bash(go mod tidy:*)",
+      "Bash(docker run --rm -v \"/home/mleku/src/next.orly.dev/cmd/benchmark/data:/data\" --user root alpine sh -c \"rm -rf /data/* /data/.[!.]*\")",
+      "Bash(head:*)",
+      "Bash(cat:*)",
+      "Bash(chmod:*)"
     ],
     "deny": [],
     "ask": []