v0.6.0 - SRE v2 Fleet Health

What's New

SRE v2 Fleet Health Dashboard

Full fleet health visibility with per-agent metrics, circuit breaker states, and trust stage progression.

New Endpoints

• GET /sre/snapshot - Expanded with v2 fields: slis, auditEvents, fleet
• GET /sre/events - Recent governance audit events with limit parameter
• GET /sre/fleet - Per-agent health status with circuit breaker state

New Module

• agent_metrics.py - AgentMetricsRegistry for per-agent operational metrics
  • Circuit breaker: closed → half-open → open
  • Trust stage derivation: CBT → KBT → IBT based on success rate
  • Thread-safe with configurable thresholds

New Types

• CircuitBreakerConfig - Configurable circuit breaker thresholds
• TrustDimension / TrustScoreV2 - Multi-dimensional trust scoring
• AuditEvent - Governance event for SRE panel
• FleetAgent - Agent health snapshot
• SliMetric - Standard 7-SLI dashboard metrics

Enhanced

• FailSafeComplianceSLI.get_slis() - Returns 7 SliMetric objects
• FailSafeAuditSink.get_recent_events() - Query recent audit events
• DecisionCallback now includes latency_ms parameter
• integration.py wires AgentMetricsRegistry into _on_decision callback

Test Coverage

• 357 tests passing
• 46 new tests for SRE v2 components

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