Marcel 287920a982 docs(ocr): document single-node constraint for OCR training ...

Training reloads the Kraken model in-process on the Python service.
The DB-level RUNNING constraint prevents concurrent API calls but
cannot protect against multi-replica deployments. Added explicit
comments in docker-compose.yml and OcrTrainingService to prevent
accidental horizontal scaling. See ADR-001.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

2026-04-13 23:01:45 +02:00

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