Add a warning to the logs if an ID is used twice (#248)

# Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

- Make the bot log a warning if the card metadata function finds duplicated ids

#233

## Type of change

Please delete options that are not relevant.

- [x] New feature (non-breaking change which adds functionality)

# How Has This Been Tested?

Please describe the tests that you ran to verify the changes. Provide instructions so we can reproduce. Please also list any relevant details to your test configuration.

# Checklist

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that provde my fix is effective or that my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream modules

Reviewed-on: #248
Reviewed-by: VylpesTester <tester@vylpes.com>
Co-authored-by: Ethan Lane <ethan@vylpes.com>
Co-committed-by: Ethan Lane <ethan@vylpes.com>

src/Functions/CardMetadataFunction.ts

@@ -39,6 +39,13 @@ export default class CardMetadataFunction {
             CoreClient.Cards = cardResult.Result!;
             AppLogger.LogInfo("Functions/CardMetadataFunction", `Loaded ${CoreClient.Cards.flatMap(x => x.cards).length} cards to database`);
 
+            const duplicateCards = CoreClient.Cards.flatMap(x => x.cards)
+                .filter((card, index, self) => self.findIndex(c => c.id === card.id) !== index);
+
+            if (duplicateCards.length > 0) {
+                AppLogger.LogWarn("Functions/CardMetadataFunction", `Duplicate card ids found: ${duplicateCards.flatMap(x => x.id).join(", ")}`);
+            }
+
             return {
                 IsSuccess: true,
             };