fix: add weasyprint to requirements.txt and Dockerfile for PDF generation

Dockerfile

@@ -30,6 +30,11 @@ RUN apt-get update \
  && apt-get install -y --no-install-recommends \
         build-essential \
         libpq-dev \
+        libpango-1.0-0 \
+        libpangoft2-1.0-0 \
+        libcairo2 \
+        libgdk-pixbuf2.0-0 \
+        libffi-dev \
  && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
@@ -50,6 +55,11 @@ RUN apt-get update \
  && apt-get install -y --no-install-recommends \
         libpq5 \
         curl \
+        libpango-1.0-0 \
+        libpangoft2-1.0-0 \
+        libcairo2 \
+        libgdk-pixbuf2.0-0 \
+        libffi8 \
  && rm -rf /var/lib/apt/lists/* \
  && groupadd -g 1000 appuser \
  && useradd -m -u 1000 -g appuser appuser

requirements.txt

@@ -42,6 +42,9 @@ jinja2>=3.1
 greenlet>=3.0
 openpyxl>=3.1
 
+# PDF generation
+weasyprint>=62.0
+
 # Monitoring
 prometheus-client>=0.20
 structlog>=24.0