POTA/SOTA: add keyboard-first activation CLI workflow and ADIF export

[rtreit]

Parent: #384

Summary

Provide the first complete operator-facing vertical slice for activation sessions through the CLI, including start, status, stop, correction-oriented inspection, and activation-bounded ADIF export.

This task depends on first-class activity references and durable activation sessions. Catalog lookup may be optional in the first implementation as long as exact references work offline.

Commands

Support an equivalent of:

• qsoripper activation start pota <ref> [<ref>...]
• qsoripper activation start sota <ref>
• qsoripper activation status
• qsoripper activation stop
• qsoripper activation list
• qsoripper activation show <id>
• qsoripper activation export <id> --format adif --output <path>
• QSO entry options for explicit worked POTA/SOTA references.

Logging behavior

• Starting an activation resolves and snapshots catalog metadata when available.
• An active session automatically supplies local references and session linkage.
• Worked P2P or summit references remain fast explicit input.
• Validation must be immediate and concise, with no network dependency in the save path.
• Existing QSO entry remains available when no activation is active.
• Stop does not automatically upload or export.

Export behavior

• Export exactly the QSOs linked to the requested session.
• Emit local and worked references from first-class fields.
• Preserve one physical QSO per contact, including multi-reference POTA lists.
• Produce stable results after restart and catalog updates.
• Do not claim direct POTA upload support where no supported upload API exists.

Tests

• CLI parsing and output tests.
• Start/log/status/stop/list/show/export end-to-end tests.
• Multi-park and P2P export fixtures.
• Offline catalog behavior.
• Invalid reference, conflicting active session, and retry behavior.

Acceptance criteria

• An operator can complete and export a POTA or SOTA activation without using a GUI.
• Local references do not need to be retyped for each QSO.
• P2P entry remains a short, keyboard-first action.
• Export selection is based on session identity, not date/ref heuristics.