[CarlosFelipeOR]

Fixes #15

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Description of Changes

Remove the size limit on the _compile_pattern cache in testflows/_core/name.py. Fixes #15.

Each step matches every live xfails/ffails pattern twice. Above 128 live patterns, the 256-entry LRU misses on every lookup and steps get about 5x slower. With maxsize=None, the repro from #15 runs 2000 steps in 0.99 s instead of 4.8 s. Test results don't change, because the cache memoizes a pure function.