fix: use main stream 1080p for detect to get HD snapshots

Sub-stream at 640x360 produced low quality snapshots and poor LPR accuracy.
Switched detect to main stream 1920x1080 at 2fps (VAAPI handles decoding).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config/config.yml

@@ -15,17 +15,15 @@ cameras:
   entree:
     ffmpeg:
       inputs:
-        - path: rtsp://admin:Wxcvbn99--$$@192.168.1.44/h264Preview_01_sub
-          roles:
-            - detect
         - path: rtsp://admin:Wxcvbn99--$$@192.168.1.44/h264Preview_01_main
           roles:
+            - detect
             - record
     detect:
       enabled: true
-      width: 640
+      width: 1920
-      height: 360
+      height: 1080
-      fps: 5
+      fps: 2
     objects:
       track:
         - car