feat: dev tool to analyze IR of corpus

[milindsrivastava1997]

Summary

• keep show_pre_asap_ir focused on ad-hoc SQL/PromQL inspection
• add analyze_corpora for PromQL and SQL corpus dumps and anomaly reports
• emit per-query JSON/JSONL records with lossless ir_debug fingerprints
• document both corpus analysis commands and ignore generated artifacts

Validation

• cargo check -p asap-devtools --bins
• PromQL corpus tests passed
• SQL corpus tests passed
• cargo test -p asap-devtools --bins passed

The full workspace test suite is currently blocked by the unrelated untracked frame_probe.rs test, whose assertion contradicts the distinct window-frame IR it prints.