Updated `DocumentEndpoints` to include detailed requirements, return values, and use case for the `ExtractSwissQrCode` endpoint.
Marked Feature 2 (`ExtractSwissQrCode`) as completed in `PHASENPLAN.md` and `ROADMAP.md`, summarizing achievements and outlining next steps for Feature 3 (`ExtractAttachments`).
Enhanced `ExtractSwissQrCodeRequest` and `ExtractSwissQrCodeResponse` DTOs with example JSON payloads for clarity.
Expanded `SwissQrCodeDataDto` and `AddressDataDto` with detailed field-level documentation to improve usability and adherence to Swiss QR Bill Standard 2.0.
Introduced DTOs for request and response to handle Swiss QR Code extraction from PDF documents. Implemented `ExtractSwissQrCodeHandler` to process the extraction using `ISwissQrCodeProcessor`. Added validation for the query with `ExtractSwissQrCodeValidator`. Developed unit tests to ensure correct behavior for successful and failure scenarios.
