Investigate latency regressions in AWS Application Signals services — p50/p90/p99 comparison vs baseline, slow-trace waterfall analysis, dependency contribution, span-to-code mapping, and correlated deploys via CloudTrail. Trigger phrases: "latency regression", "service got slow", "p99 spike", "p99 increased", "tail latency", "slow service", "high latency", "response time increase", "API got slow", "endpoint slow", "latency anomaly", "performance degradation", "performance regression", "investigate latency", "slow API", "slow endpoint", "request duration up", "slow traces", "increased response time", or any request about diagnosing why a service or operation got slower.
