Add ARGS JSON body test configuration

[0xst3m]

Summary

The existing ARGS test cases (CONF_002_TARGET_ARGS_A-GET and CONF_002_TARGET_ARGS_B-POST) only cover application/x-www-form-urlencoded bodies. This PR adds coverage for JSON request bodies, which are processed through a different code path via ctl:requestBodyProcessor=JSON.

Changes

Added config_tests/CONF_009_TARGET_ARGS_JSON.yaml which tests:

• Targets: ARGS (any key) and ARGS:foo (specific key)
• Phases: 2, 3, and 4
• Method: POST with Content-Type: application/json
• Operator: @contains attack

The test sends {"foo": "attack"} as the request body, relying on the existing JSON processor rule (id:200001 in modsecurity.conf) to populate ARGS from the parsed JSON.

Test Results

All 6 generated rules passed on mod_security2 (Apache)