FIX AI categorization & Twelvedata currency (#354)

* FIX AI categorization

* FIX twelve data API

Looking at api docs we were using the wrong field, currency is in meta tag.

app/models/family/auto_categorizer.rb

@@ -45,9 +45,8 @@ class Family::AutoCategorizer
           category_id,
           source: "ai"
         )
+        transaction.lock_attr!(:category_id)
       end
-
-      transaction.lock_attr!(:category_id)
     end
   end
 

app/models/family/auto_merchant_detector.rb

@@ -50,11 +50,9 @@ class Family::AutoMerchantDetector
           merchant_id,
           source: "ai"
         )
-
+        # We lock the attribute so that this Rule doesn't try to run again
+        transaction.lock_attr!(:merchant_id)
       end
-
-      # We lock the attribute so that this Rule doesn't try to run again
-      transaction.lock_attr!(:merchant_id)
     end
   end
 

app/models/provider/twelve_data.rb

@@ -187,7 +187,7 @@ class Provider::TwelveData < Provider
           symbol: symbol,
           date: date.to_date,
           price: price,
-          currency: parsed.dig("currency"),
+          currency: parsed.dig("meta", "currency") || parsed.dig("currency"),
           exchange_operating_mic: exchange_operating_mic
         )
       end.compact