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docs(#148): 1.9.2-patch2 changelog (server-only eviction-storm net; not a #148 close)

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CHANGELOG.md
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# Changelog # Changelog
## 1.9.2-patch2
**Server/CMS-only field-safe net for #148 — NO Android APK, players unchanged.** Makes the
server absorb a device that opens duplicate/rapid sockets, so a thrashing PAIRED device
converges to ONE stable connection and stays online. It does **NOT** fix the client opening
duplicate sockets (the APK duplicate-socket root cause — separate track); **#148 is not closed
on this alone.**
### Fixed / hardened — eviction storm (#148)
- **Per-device session-settle debounce.** When a device_id with a LIVE incumbent socket opens
another socket within a short window (`SESSION_SETTLE_WINDOW_MS`, default 2500ms), the
duplicate is **soft-refused and the incumbent kept** — so a duplicate burst converges on one
connection and the device stays online, instead of churning through evictions. This closes
the gap the reconnect-throttle's **30s post-restart warm-up** leaves open (during warm-up only
the hard ceiling applies, so a burst passed undamped and each new socket evicted the prior).
The debounce is **warm-up-independent**.
- **Liveness safeguard:** the incumbent is only kept if its socket is genuinely live; a
dead/half-open incumbent is replaced — the device is **never stranded offline**.
- **Soft refusal, never a quarantine** (paired-safe); single-session enforcement intact for a
legitimate move; unpaired/abusive flapping still caught by the existing limiters.
Operational note: a chunk of the observed churn was the warm-up window **re-opening on every
rapid patch redeploy** — the debounce closes that in code, but reducing redeploy frequency
independently reduces warm-up-window exposure.
Server/CMS only; ships no APK (versionCode still increments so a future player build is
OTA-recognized). Docker: `ghcr.io/screentinker/screentinker:1.9.2-patch2` (pre-release —
`:latest` stays at 1.9.2).
## 1.9.2-patch1 ## 1.9.2-patch1
**Server/CMS-only connection-lifecycle hardening for #148 — NO Android APK, players stay on **Server/CMS-only connection-lifecycle hardening for #148 — NO Android APK, players stay on