Add analysis_types passthrough from Flotilla to SARA - #1133

Summary

Carry a per-inspection analysis_types list from Flotilla through ISAR to SARA, without ISAR inspecting the values. ISAR is a courier here; SARA validates.

• StartMissionInspectionDefinition.analysis_types: list[str] | None is threaded onto every InspectionTask, copied to InspectionMetadata, and re-emitted as required_analysis on the MQTT InspectionResultPayload consumed by SARA. The list is also written to the metadata sidecar JSON.
• Backward compatible in both directions: missions without the field produce null on the wire; SARA falls back to its existing default-analysis-by-file-extension behaviour.
• Wire field uses snake_case to match the surrounding fields in the ISAR-facing serializer on Flotilla's side (inspection_target, inspection_description).

Related PRs

• Flotilla: Replace echo missions with just using mission definitions flotilla#2694 (must add the matching `analysis_types` field to `IsarInspectionDefinition.cs` to populate this end-to-end)
• SARA: Rebuild SARA around generic Analysis pipeline sara#363 (consumes `required_analysis` from the MQTT payload)

Tests

• New parametrized test in `test_start_mission_definition.py` confirms the field defaults to `None` for all six inspection types.
• Updated JSON fixture exercises the field end-to-end through `to_isar_mission`.
• New uploader tests assert `required_analysis` round-trips to the published MQTT JSON for both populated and absent cases.

Drive-by

• Fixed `StorageFake.store()` to return `StoragePaths` (previously returned `None`, violating the abstract interface) so the new uploader tests can reuse the shared mock.
• Replaced fixed `time.sleep` waits in `tests/isar/storage/test_uploader.py` with a polling `_wait_until` helper where the assertion is on the presence of an event; cuts ~3s off the suite.