feat: monitoring dashboards and alerting for test run telemetry

[kristopherjturner]

Overview

Implement real-time monitoring dashboards and alerting integration for load test runs. Metrics captured during test execution should be visible in Grafana and optionally forwarded to Azure Monitor.

Scope

• Prometheus metrics exporter for active test sessions (IOPS, throughput, latency, CPU, memory)
• Grafana dashboard templates for each tool (FIO, HammerDB, VMFleet, iPerf)
• Azure Monitor / Log Analytics forwarding for test run telemetry
• Alert rules for anomalous results during testing (e.g., unexpected latency spike)
• Live terminal summary output during test runs

Acceptance Criteria

• Prometheus endpoint exposed during active test sessions
• Grafana dashboards auto-provisioned from templates in monitoring/
• Optional Azure Monitor forwarding configurable in YAML
• Live terminal progress bar / metrics display during runs
• Alert rules for test anomaly detection

Dependencies

• Parent Epic: [Epic] Load Testing Toolkit Full Build-Out #8
• Core framework: feat: core framework modules (session, collector, logger, reporter) #10
• VMFleet integration: feat: VMFleet S2D fleet storage testing integration #15