fix(ramps-controller): trim assetId and walletAddress in getQuotes

[AxelGes]

Summary

Fixes a bug in getQuotes() where assetId and walletAddress were validated to not be empty/whitespace but the untrimmed values were used in the cache key and sent to the API. This could cause issues if values with leading/trailing spaces were passed.

Changes

• Normalize assetId and walletAddress by trimming them after validation
• Use normalized values consistently in cache key and params sent to API
• Add test to verify trimming behavior works correctly

Test plan

• All existing tests pass
• New test added to verify assetId and walletAddress are trimmed before being sent to the service

Related

Follow-up fix to #7747

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Note

Low Risk
Low risk: small normalization change limited to getQuotes plus a targeted unit test; main impact is cache key/param normalization which could change caching behavior for inputs with whitespace.

Overview
Fixes RampsController.getQuotes to trim assetId and walletAddress after validation and then use the normalized values consistently in the request cacheKey and service params.

Adds a unit test covering whitespace-trim behavior and records the fix in CHANGELOG.md.

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