Debug export: strap & data state + analytics-funnel diagnostics

[ryanbr]

Enriches the shareable strap-log / bundle header, which was connectivity-only (device, OS, battery-opt, permissions), for the data-quality bug classes that actually recur (no steps / 0% REM / skin-temp absent / missing nights).

Added

Strap & data state (offline-safe — persisted prefs + the my-whoop daily spine):

• Strap model, last-known firmware (now persisted on connect so it survives disconnect + the background export), last-sync (relative), timezone/offset, days of history, most recent sleep + recovery day.

Analytics funnels (latest night, best-effort, self-reporting):

• Recomputes the REM + skin-temp funnels for the most recent sleep session and prints each .summary, so a "0% REM" / "skin-temp absent" report arrives with the funnel already broken down.
• Prints the sample counts it read, and says plainly when it cannot compute (no recent session / no raw samples under the canonical id) — so it never fabricates a misleading verdict.

Plumbing

• New AndroidDiagnostics.dynamicLines(context) (suspend, on Dispatchers.Default) appended to both the interactive and scheduled export headers.
• LogExport share/write paths become suspend; DebugExportWorker already runs in a coroutine; the 4 UI share buttons now launch on their screen scope.
• NoopPrefs.lastFirmware persisted at the firmware-decode point.

Scope / safety

• No analytics-pipeline changes — all additions live in the diagnostics/export layer (kept out of the perf-sensitive analyze path deliberately).
• Every section is guarded (best-effort) so a header build never throws into the export.
• Kotlin + unit-test sources compile clean locally.

Not included (deliberate)

• Battery %/live-only fields in the scheduled export (no live BLE there); iOS parity — both as follow-ups if wanted.