fix(analysis): hold the OCR permit for the full blocking inference

The OCR dispatcher acquired a borrowed semaphore permit, then ran the
CPU-bound inference in `spawn_blocking`. On cancellation (graceful
shutdown) the future dropped the permit while the detached blocking task
kept running, briefly oversubscribing the blocking pool past
ANALYSIS_WORKERS.

Extract `run_ocr_blocking`, which acquires an *owned* permit and moves it
into the blocking task so the concurrency slot's lifetime matches the
actual work. Covered by a cancellation-invariant test asserting the
permit stays held after the caller future is aborted.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
MechaCat02
2026-07-03 21:08:50 +02:00
parent 5dc93bfb84
commit 3a9e7ca2da
4 changed files with 86 additions and 11 deletions

2
backend/Cargo.lock generated
View File

@@ -1558,7 +1558,7 @@ checksum = "c41e0c4fef86961ac6d6f8a82609f55f31b05e4fce149ac5710e439df7619ba4"
[[package]]
name = "mangalord"
version = "0.93.5"
version = "0.93.6"
dependencies = [
"anyhow",
"argon2",