Initial commit: Image moderation service using local vision LLM

.env.example

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+PORT=8100
+VISION_AI_URL=http://localhost:8000/v1/chat/completions
+VISION_AI_MODEL=gemma3:4b
+VISION_AI_TIMEOUT=90000
+TILE_THRESHOLD=1024
+
+# Callbacks when image is flagged unsafe
+UPLOAD_SERVICE_REPLACE_URL=http://192.168.0.145:3003/internal/replace
+UPLOAD_SERVICE_SECRET=<same as IMAGE_UPLOAD_SECRET on NAS>
+PAROCHIA_CALLBACK_URL=https://parochia.org/api/images/moderation-callback
+PAROCHIA_CALLBACK_SECRET=<same as MODERATION_CALLBACK_SECRET on NAS>