• I read the [Generative AI policy](https://developer.joomla.org/generative-ai-policy.html) and my contribution is either not created with the help of AI or is compatible with the policy and GNU/GPL 2 or later.

Summary of Changes

Replace str_replace("\n", ' ', print_r($values, 1)) with
json_encode($values, JSON_UNESCAPED_SLASHES) in three JDEBUG-only
debug log statements inside BaseController.

Affected methods

• checkEditId()
• holdEditId()
• releaseEditId()

Testing Instructions

1. Enable JDEBUG in Joomla configuration.

2. Trigger actions that call:

   • checkEditId()
   • holdEditId()
   • releaseEditId()

3. Verify log output.

Ensure that:

• Logs are generated correctly
• Output is in JSON format
• No functional behavior is affected

Actual result BEFORE applying this Pull Request

Debug logs used print_r() combined with str_replace(),
producing verbose and less readable output with unnecessary processing overhead.

Expected result AFTER applying this Pull Request

Debug logs use json_encode(), producing cleaner, compact, and
more efficient single-line output without extra processing.

Link to documentations

• No documentation changes for guide.joomla.org needed
• No documentation changes for manual.joomla.org needed