Feature/support custom tracker workflow

[javlor]

This PR adds the data model and API classes needed to supply custom tracker rotation schedules to the SolarFarmer.

• New enum: TrackerAlgorithm. Adds a TrackerAlgorithm string enum with four values: CUSTOM_ROTATIONS, SLOPE_AWARE_BACKTRACKING, STANDARD_BACKTRACKING, and SUN_TRACKING.
• Layout model. Adds two new optional fields: tracker_rotation_id (references the custom rotation schedule (by key) that this layout should follow. Required when tracker_algorithm is CUSTOM_ROTATIONS) and dc_ohmic_connector_resistance (expresses DC ohmic wiring loss directly in ohms rather than as a fractional loss).
• EnergyCalculationOptions model. Adds three new optional fields: custom_tracker_rotations_are_at_middle_of_period (whether the supplied rotation values represent the middle or the start of each time step), return_tracker_rotations_time_series (requests tracker rotation angles in the time-series output), return_tracker_incidence_angles_time_series (requests tracker incidence angles in the time-series output).
• TrackersConditionsDataset model. Introduces the TrackerCondition and TrackersConditionsDataset Pydantic models that mirror the .NET TrackersConditionsDatasetDto. Includes full protobuf serialization and deserialization through gzip-compressed files, with helpers to convert between Python datetime objects and .NET DateTimeOffset ticks. Deserialization supports both single-file (TrackersConditionsDatasetDto_Protobuf.gz) and multi-part naming (TrackersConditionsDatasetDto_Protobuf001of002.gz).

Workflow 1 auto-discovery:

• get_files (used by run_energy_calculation when an input folder is given) now automatically discovers any TrackersConditionsDatasetDto_Protobuf*.gz files in the folder and uploads them as customRotationDataTransferFiles. parse_files_from_paths gains a tracker_rotation_paths parameter for explicit path workflows.