c74539b04b
New confidence.py module with two functions: - apply_confidence_markers(): replaces words below threshold with [unleserlich], collapses adjacent markers into one - words_from_characters(): reconstructs word-level confidence from Kraken's character-level data Surya 0.17 provides native word-level confidence via line.words. Kraken 7.0 provides per-character confidences via record.confidences. Both engines now pass word+confidence data through main.py, which applies the marker post-processing before returning the API response. Threshold configurable via OCR_CONFIDENCE_THRESHOLD env var (default 0.3). Frontend already renders [unleserlich] markers via transcriptionMarkers.ts. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>