Expose play-by-play position fields

[tpitzel]

What changed

• Add all play-by-play participant-position ID fields to PlayByPlayResponse.
• Map those fields from the API response in the model constructor.
• Map Lcb with a fallback to the legacy Fcb response field.

Why

The API play-by-play payload exposes the player IDs assigned to formation positions, but the Interface response model omitted them. That prevented typed Interface code from reliably consuming those values and left the LCB field-name migration unrepresented.

Impact

Interface code can consume the play-by-play participant IDs through the typed model, including both current Lcb and legacy Fcb payloads. This model-only change does not alter the visible Interface by itself.

Checks

• git diff --check upstream/main...HEAD
• Direct TypeScript syntax parse of src/models/footballModels.ts
• The repository-wide tsc --noEmit check was also run; it currently reports existing errors in unrelated files, with no error in the changed model file.