First attempt at converting "sig" to "activity" for v3

config-example.yml

@@ -130,25 +130,25 @@ spot_providers:
     url: "wss://39c3.totawatch.de/api/spot/live"
     # For the "XOTA" provider, an activity must be set manually here because xOTA is a generic backend for xOTA
     # programmes and so different URLs potentially provide different programmes.
-    sig: "Toilets"
+    activity: "Toilets"
     # For Toilets on the Air, we prefix the activity references (T-01 etc) with some characters that define the
     # conference: C3, EH or HOPE - so we can look up the correct locations in our database, because each conference
     # starts from T-01 but refers to a toilet in a different building (or continent!)
-    sig_ref_prefix: "C3"
+    activity_ref_prefix: "C3"
 
   - class: "XOTA"
     name: "EH23 TOTA"
     enabled: false
     url: "wss://eh23.totawatch.de/api/spot/live"
-    sig: "Toilets"
-    sig_ref_prefix: "EH"
+    activity: "Toilets"
+    activity_ref_prefix: "EH"
 
   - class: "XOTA"
     name: "HOPE26 TOTA"
     enabled: false
     url: "wss://hope-26.totawatch.de/api/spot/live"
-    sig: "Toilets"
-    sig_ref_prefix: "HOPE"
+    activity: "Toilets"
+    activity_ref_prefix: "HOPE"
 
 
 # Alert providers to use. Same setup as the spot providers list above.
@@ -218,7 +218,7 @@ static_data_providers:
 
 # Activity reference data providers to use. These allow Spothole to download, for example, the WWFF directory that
 # maps WWFF park IDs to their name and location.
-sig_ref_data_providers:
+activity_ref_data_providers:
   - class: "POTA"
     enabled: true