Schema Validation with Pandera

Day 42 of 100 Days of MLOps. Meet Pandera — a lightweight library for declaring exactly what your data must look like (columns, types, ranges) and enforcing it in code. Write a schema, point it at yesterday's poisoned batch, and watch it reject the bad data with a clear, specific error — the guardrail that stops silent data disasters before they reach your model. Runs 100% locally on any OS.