Add Bambuddy InvenTree sync service

.env.example

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+# Copy this file to .env and adjust values for your Windows Server.
+
+# Bambuddy API base URL. You can use either root URL or /api/v1 URL.
+BAMBUDDY_BASE_URL=http://host.docker.internal:8000/api/v1
+BAMBUDDY_API_KEY=replace-with-bambuddy-api-key
+
+# InvenTree URL. Use root URL or /api URL; the service normalizes it.
+INVENTREE_BASE_URL=http://host.docker.internal:1337
+INVENTREE_TOKEN=replace-with-inventree-token
+
+# Existing InvenTree IDs where printed parts should be created/stored.
+INVENTREE_PART_CATEGORY_ID=1
+INVENTREE_STOCK_LOCATION_ID=1
+
+# Optional tokens for this sync service.
+# If SERVICE_API_TOKEN is set, manual sync endpoints require X-Service-Token.
+SERVICE_API_TOKEN=change-me
+# If WEBHOOK_SHARED_SECRET is set, Bambuddy webhook requests must send X-Sync-Secret.
+WEBHOOK_SHARED_SECRET=
+
+# Sync behavior.
+SYNC_SUCCESS_ONLY=true
+DEFAULT_STOCK_QUANTITY=1
+INVENTREE_STOCK_STATUS=10
+PART_IPN_PREFIX=BMB
+PART_KEY_FIELDS=filename,name
+BACKFILL_PAGE_SIZE=50
+POLL_INTERVAL_SECONDS=0
+SYNC_ON_STARTUP=false
+HTTP_TIMEOUT_SECONDS=30
+
+# Persistent SQLite database inside the container.
+DATA_DIR=/data