feat(analysis): add ocrs OCR backend and OCR-driven page text search

Adds an in-process ocrs OCR backend as the active analysis engine
(vision left dormant), enables OCR text search on the page-tag
aggregation endpoints, and reshapes the admin analysis/settings UI to
present the OCR-only surface. Bumps version 0.89.0 -> 0.90.0.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docker-compose.yml

@@ -143,8 +143,15 @@ services:
       # when both are present. Leave unset for the bundled
       # HashedControlPassword path above.
       CRAWLER_TOR_CONTROL_COOKIE_PATH: ${CRAWLER_TOR_CONTROL_COOKIE_PATH:-}
-      # Analysis worker (vision) — boot seeds + env-only API key.
+      # Analysis worker — boot seeds + env-only API key.
       ANALYSIS_ENABLED: ${ANALYSIS_ENABLED:-false}
+      # Engine selection (deploy-time): `ocr` (in-process ocrs, default).
+      # The `vision` (local LLM) backend is temporarily disabled — the worker
+      # forces OCR regardless, so a `vision` override here is currently inert.
+      # Model paths default to the image-baked /models.
+      ANALYSIS_BACKEND: ${ANALYSIS_BACKEND:-ocr}
+      OCRS_DETECTION_MODEL: ${OCRS_DETECTION_MODEL:-/models/text-detection.rten}
+      OCRS_RECOGNITION_MODEL: ${OCRS_RECOGNITION_MODEL:-/models/text-recognition.rten}
       ANALYSIS_VISION_URL: ${ANALYSIS_VISION_URL:-}
       ANALYSIS_VISION_MODEL: ${ANALYSIS_VISION_MODEL:-}
       ANALYSIS_WORKERS: ${ANALYSIS_WORKERS:-1}