* feat: add concurrency support to ProcessSupervisor
- Replace the single-slot mutex channel with a configurable semaphore to
allow multiple concurrent tasks.
- Add drain logic to ensure all active
tasks complete before process restarts.
* feat: add chromium-max-concurrency flag
- Add a --chromium-max-concurrency flag (1-6) to the Chromium module to
control how many conversions run in parallel.
- Update LibreOffice to pass maxConcurrency=1 as LibreOffice only supports
a single concurrent conversion.
* test: add integration tests for concurrent Chromium conversions
- Add concurrent request support to the integration test framework with
new step definitions for sending parallel requests and asserting on all
responses.
- Add a feature file for concurrent HTML to PDF conversions.
* only build debug info when log level is debug
* introduce new flag 'gotenberg-build-debug-data'
* add gotenberg-build-debug-data flag to Makefile
* add new integration test for gotenberg-build-debug-data flag
* update GET /debug (Enabled) test with gotenberg-build-debug-data flag
* reorder GOTENBERG_BUILD_DEBUG_DATA in Makefile
* reorder Build Debug Data Disabled test scenario
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Co-authored-by: Hector Zarate <hector@Hectors-MacBook-Pro.local>
