Module regression 

Tile-pipeline regression harness utilities.

This module provides a small, dependency-free regression harness for the HTTP raster tile pipeline. It serves two purposes:

1. Parse the authoritative route fixture in docs/debug/rustial_debug_values.csv.
2. Capture comparable per-frame telemetry from MapState and evaluate it against configurable thresholds.

The CSV schema is intentionally machine-comparable and stable so tests, scripted runs, and benchmarks can exchange the same sample format.

Structs

TilePipelineRegressionEvaluation

Result of evaluating a regression run against thresholds.

TilePipelineRegressionSample

One machine-comparable tile-pipeline telemetry sample.

TilePipelineRegressionSummary

Aggregate statistics computed across a sequence of regression samples.

TilePipelineRegressionThresholds

Thresholds used to fail a regression run when behavior degrades.

TilePipelineRegressionViolation

One threshold violation reported by the regression harness.

Enums

TilePipelineRegressionParseError

Parse errors produced by TilePipelineRegressionSample::parse_csv.

Constants

TILE_PIPELINE_REGRESSION_CSV_HEADER

CSV header emitted by TilePipelineRegressionSample::to_csv.