Improvements in Session Tracing:

• Fixed PL/pgSQL function tracing – now works correctly.
• Added PID at the start of the file for better trace identification.
• Added query start time for precise timing analysis.
• Improved format for nested queries (better readability and structure).
• Updated documentation and JSON Schema for session trace output format.
  Other Changes:
• Fixed stat_hist_uprobe SQL function (resolved known issues).
• Added test suite for the extension:
  Tests are written in Python using the testgres library.
  Prerequisites:
  ▪ Ensure PG_CONFIG environment variable points to the pg_config executable.
  ▪ Run make python_tests to execute the tests.
• Added FreeBSD support.
• Upgraded Frida-Gum to version 17.1.5.