What changed

• Fixed a crash that could happen when sharing debug logs if zipping fails (e.g., disk full)
• Fixed debug logs not being shareable when only the compressed file exists (no raw log directory)
• Improved cleanup when deleting all debug sessions to properly reset internal tracking state
• Moved automatic compression of orphaned debug sessions out of the data pipeline to prevent redundant work

Technical Context

• RecorderActivityVM.share() had no error handling around getZipUri() and the VM doesn't implement ErrorEventSource, so any exception would crash. Added try-catch with logging.
• share() also guarded on logDir being non-null, which silently prevented sharing zip-only sessions. getZipUri() only needs the session ID, not the log directory. Removed the guard.
• DebugSessionManager.sessions combine lambda launched auto-zip coroutines as a side effect. Moved orphan detection to a separate init collector with atomic pendingAutoZips.add() as the sole dedup guard, keeping the combine transformation pure.
• deleteAllSessions() cleared failedZipIds but not pendingAutoZips, leaving stale entries. Added pendingAutoZips.clear().
• Replaced two !! operators with requireNotNull for clearer crash messages if invariants are ever violated.