fix: Build errors and tesseract removal

ocr/Dockerfile

@@ -2,7 +2,6 @@
 # Uses mirrored base images from Gitea Package Registry
 #
 # Primary engine: PaddleOCR PP-OCRv4 (models baked into image)
-# Backward compat: Tesseract 5.x (optional, via TesseractEngine)
 # Cloud fallback: Google Vision (optional, requires API key at runtime)
 
 # Build argument for registry (defaults to Gitea mirrors, falls back to Docker Hub)
@@ -11,21 +10,16 @@ ARG REGISTRY_MIRRORS=git.motovaultpro.com/egullickson/mirrors
 FROM ${REGISTRY_MIRRORS}/python:3.13-slim
 
 # System dependencies
-# - tesseract-ocr/eng: Backward-compatible OCR engine (used by TesseractEngine)
 # - libgomp1: OpenMP runtime required by PaddlePaddle
 # - libheif1/libheif-dev: HEIF image support (iPhone photos)
 # - libglib2.0-0: GLib shared library (OpenCV dependency)
-# - libgl1-mesa-glx: OpenGL runtime (OpenCV cv2 dependency, pulled by PaddleX)
 # - libmagic1: File type detection
 # - curl: Health check endpoint
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    tesseract-ocr \
-    tesseract-ocr-eng \
     libgomp1 \
     libheif1 \
     libheif-dev \
     libglib2.0-0 \
-    libgl1-mesa-glx \
     libmagic1 \
     curl \
     && rm -rf /var/lib/apt/lists/*
@@ -33,7 +27,11 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 # Python dependencies
 WORKDIR /app
 COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+# Install dependencies. PaddleX (transitive via paddleocr) pulls in the full
+# opencv-python which requires libGL.so.1.  Force-reinstall the headless
+# variant afterwards so the container stays GUI-free.
+RUN pip install --no-cache-dir -r requirements.txt \
+    && pip install --no-cache-dir --force-reinstall opencv-python-headless
 
 # Pre-download PaddleOCR PP-OCRv4 models during build (not at runtime).
 # Models are baked into the image so container starts are fast and