v0.1: Validate diagnostic detector on exact WoT client

[Mewt0]

Goal

Prove that the diagnostic detector tracks the same sustained outage seen as WoT's red network indicator without changing the connection.

Scope

• Build/install diagnostic v0.1.
• Validate BigWorld.statLagDetected() and BigWorld.statPing() behavior.
• Capture IConnectionManager.isConnected() and arena.period during RED/GREEN transitions.
• Verify lifecycle start/stop and replay behavior.
• Confirm exactly one WOULD RECONNECT per continuous outage.

Test matrix

Follow docs/TESTING.md D01-D12.

Acceptance criteria

• No import/init exceptions.
• Short RED spikes below 3s never trigger WOULD RECONNECT.
• Sustained RED >3s triggers exactly once.
• RED->GREEN resets the timer.
• Logs establish whether statLagDetected() becomes sustained while ConnectionManager still reports connected.
• Replay is inert.
• v0.1 performs no network-changing action.

Evidence to attach

• exact WoT version/build
• SmartReconnect version
• relevant python.log excerpts
• visible RED/GREEN behavior
• approximate outage duration

Blocks all enabled reconnect work.