INPRISM-Labs/PinRism.Lib

AI Summary: Modify the existing OCR API to return structured JSON instead of plain text. The JSON should include extracted key-value pairs (like name, date, address) and metadata about the input image. Error handling should also be improved to return structured JSON error responses.

AI Summary: The task is to fix a security vulnerability in the PinRism.Lib .NET OCR library. The current implementation exposes the Google Gemini API key in the URL query string, which is a major security risk. The solution involves modifying the `GeminiOcrService` class to send the API key as an HTTP header instead of in the query string, ensuring the key is not exposed.