feat: add Syncthing service for Hermes org-file sync

ai/compose.yml

@@ -54,6 +54,10 @@ services:
       - TZ=America/Montreal
     volumes:
       - /mnt/HoardingCow_docker_data/Hermes/data:/opt/data
+      # Syncthing-shared org files — read-only view of user's agenda
+      - /mnt/HoardingCow_docker_data/Syncthing/org-ro:/opt/data/org-ro:ro
+      # Syncthing-shared inbox — write tasks here, they sync to user's laptop
+      - /mnt/HoardingCow_docker_data/Syncthing/org-rw:/opt/data/org-rw:rw
     devices:
       - /dev/kfd:/dev/kfd
       - /dev/dri:/dev/dri
@@ -63,6 +67,24 @@ services:
     networks:
       - ai_backend
 
+  syncthing:
+    image: syncthing/syncthing:latest
+    container_name: syncthing
+    hostname: syncthing
+    restart: always
+    ports:
+      - "127.0.0.1:8384:8384"
+      - "22000:22000"
+      - "21027:21027/udp"
+    environment:
+      - TZ=America/Montreal
+    volumes:
+      - /mnt/HoardingCow_docker_data/Syncthing/config:/var/syncthing/config
+      - /mnt/HoardingCow_docker_data/Syncthing/org-ro:/org-ro
+      - /mnt/HoardingCow_docker_data/Syncthing/org-rw:/org-rw
+    networks:
+      - ai_backend
+
   ollama:
     build:
       context: ./ollama