feat(recovery,context): tier-2 intent-holder arbiter + remaining-delta pinning + surfaced signal events

- recovery: two-tier repair ladder — owner then arbiter (recovery stage recast
  as intent-holder, holds initial intent, reconciles cross-file contract disputes)
  with independent INTENT_ROUTE_BUDGET; RecoveryRoutingTest coverage
- context: remaining-delta checklist pinning (RemainingDelta{Pinning,Entry}Test)
- surface write-only events (session name, quality signals) into stats/browse
- parseToolArguments lenient-Json fallback for bare-key drift
- tools: ChildProcess seam

apps/cli/src/main/kotlin/com/correx/apps/cli/commands/StatsCommand.kt

@@ -54,6 +54,18 @@ data class TierApprovalStatsDto(
     val avgWaitMs: Long,
 )
 
+@Serializable
+data class QualityStatsDto(
+    val sourceFetches: Long = 0,
+    val lowQualityExtractions: Long = 0,
+    val extractionQualityRate: Double = 1.0,
+    val retrievedHits: Long = 0,
+    val droppedHits: Long = 0,
+    val retrievalPrecision: Double = 1.0,
+    val briefDriftCount: Long = 0,
+    val capabilityGapCount: Long = 0,
+)
+
 @Serializable
 data class StatsReportDto(
     val sessionId: String,
@@ -75,6 +87,7 @@ data class StatsReportDto(
     val avgApprovalWaitMs: Long = 0,
     val perTier: List<TierApprovalStatsDto> = emptyList(),
     val failures: FailureMetricsDto = FailureMetricsDto(),
+    val quality: QualityStatsDto = QualityStatsDto(),
     val inferencePct: Double = 0.0,
     val toolPct: Double = 0.0,
     val approvalWaitPct: Double = 0.0,
@@ -146,6 +159,17 @@ fun renderStats(report: StatsReportDto): String {
         "stage: ${f.stageFailures}  workflow: ${f.workflowFailures}"
     lines += ""
 
+    val q = report.quality
+    lines += "Signal quality"
+    lines += "  extraction:  %d fetched, %d low-quality  (%.0f%% clean)".format(
+        Locale.ROOT, q.sourceFetches, q.lowQualityExtractions, q.extractionQualityRate * 100.0,
+    )
+    lines += "  retrieval:   %d kept, %d filtered  (%.0f%% precision)".format(
+        Locale.ROOT, q.retrievedHits, q.droppedHits, q.retrievalPrecision * 100.0,
+    )
+    lines += "  brief drift: ${q.briefDriftCount}   capability gaps: ${q.capabilityGapCount}"
+    lines += ""
+
     lines += "Time accounting (% of session wall time)"
     lines += "  inference: %.1f%%   tools: %.1f%%   approval-wait: %.1f%%   other: %.1f%%".format(
         Locale.ROOT,