fix: recover stuck diagnostic sessions safely

docs/gateway/configuration-reference.md

@@ -920,6 +920,7 @@ Notes:
     enabled: true,
     flags: ["telegram.*"],
     stuckSessionWarnMs: 30000,
+    stuckSessionAbortMs: 600000,
 
     otel: {
       enabled: false,
@@ -959,6 +960,7 @@ Notes:
 - `enabled`: master toggle for instrumentation output (default: `true`).
 - `flags`: array of flag strings enabling targeted log output (supports wildcards like `"telegram.*"` or `"*"`).
 - `stuckSessionWarnMs`: no-progress age threshold in ms for classifying long-running processing sessions as `session.long_running`, `session.stalled`, or `session.stuck`. Reply, tool, status, block, and ACP progress reset the timer; repeated `session.stuck` diagnostics back off while unchanged.
+- `stuckSessionAbortMs`: no-progress age threshold in ms before eligible stalled active work may be abort-drained for recovery. When unset, OpenClaw uses the safer extended embedded-run window of at least 10 minutes and 5x `stuckSessionWarnMs`.
 - `otel.enabled`: enables the OpenTelemetry export pipeline (default: `false`). For the full configuration, signal catalog, and privacy model, see [OpenTelemetry export](/gateway/opentelemetry).
 - `otel.endpoint`: collector URL for OTel export.
 - `otel.tracesEndpoint` / `otel.metricsEndpoint` / `otel.logsEndpoint`: optional signal-specific OTLP endpoints. When set, they override `otel.endpoint` for that signal only.

docs/gateway/opentelemetry.md

@@ -216,11 +216,18 @@ OpenClaw classifies sessions by the work it can still observe:
   still making progress.
 - `session.stalled`: active work exists, but the active run has not reported
   recent progress. Stalled embedded runs stay observe-only at first, then
-  abort-drain after at least 10 minutes and 5x `diagnostics.stuckSessionWarnMs`
-  with no progress so queued turns behind the lane can resume.
+  abort-drain after `diagnostics.stuckSessionAbortMs` with no progress so queued
+  turns behind the lane can resume. When unset, the abort threshold defaults to
+  the safer extended window of at least 10 minutes and 5x
+  `diagnostics.stuckSessionWarnMs`.
 - `session.stuck`: stale session bookkeeping with no active work. This releases
   the affected session lane immediately.
 
+Recovery emits structured `session.recovery.requested` and
+`session.recovery.completed` events. Diagnostic session state is marked idle
+only after a mutating recovery outcome (`aborted` or `released`) and only if the
+same processing generation is still current.
+
 Only `session.stuck` emits the `openclaw.session.stuck` counter, the
 `openclaw.session.stuck_age_ms` histogram, and the `openclaw.session.stuck`
 span. Repeated `session.stuck` diagnostics back off while the session remains