Improve OGC API Process payload metadata, parameter mapping, and test coverage

[fabricebrito]

This PR strengthens the OGC API Process integration in three areas.

It improves service parameter discovery in ogc_api_process.py so more schema shapes are mapped correctly, including GeoJSON/polygon inputs, date-time values, date intervals, array-of-string parameters, and additional numeric/string cases.

It updates OGC job execution payload construction to send both:

• inputs
• properties

The properties block now includes the job title, application, and user metadata extracted from the authenticated token when available.

It also adds broad test coverage for the OGC platform implementation, including:

• parameter type mapping for all supported types
• job ID splitting
• status mapping
• API client creation
• async job execution payloads
• job status retrieval
• STAC and GeoJSON result handling
• fallback empty collection behavior
• auth claim extraction helpers

Validation

pytest -q tests/platforms/test_ogc_api_process_platform.py
pytest -q tests/test_auth.py tests/platforms/test_ogc_api_process_platform.py

[floeschau]

Successfully tested.