fix: harden cache init and nlp metrics edge cases#875

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AhmedAli58 wants to merge 4 commits intosunlabuiuc:masterfrom

AhmedAli58:bench/polars-streaming-loader-benchmark

Commits on Feb 23, 2026

feat: add streaming vs in-memory loader benchmark
ahmed79x7
committed

Commits on Feb 24, 2026

bench: add Polars streaming vs in-memory loader benchmark
ahmed79x7
committed

Commits on Feb 25, 2026

fix: improve metrics reliability with regression tests
ahmed79x7
committed

Commits on Mar 1, 2026

fix: harden cache init and nlp metrics edge cases
ahmed79x7
committed