like stat falsification respects escape characters

[onursatici]

Summary

In pruning of like expressions. We didn't remove the escape characters in the pattern, so we were getting wrong prefixes and exact patterns forwarded to further stat falsification

Testing

unit tests

[codspeed-hq]

Merging this PR will degrade performance by 10.46%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚡ 1 improved benchmark
❌ 8 regressed benchmarks
✅ 1242 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	chunked_varbinview_canonical_into[(100, 100)]	273.2 µs	307.9 µs	-11.29%
⚡	Simulation	chunked_varbinview_opt_canonical_into[(1000, 10)]	225.1 µs	187.6 µs	+19.99%
❌	Simulation	encode_varbin[(1000, 2)]	142.2 µs	163.2 µs	-12.87%
❌	Simulation	encode_varbin[(1000, 32)]	149.6 µs	166.9 µs	-10.4%
❌	Simulation	encode_varbin[(1000, 4)]	142.8 µs	164.1 µs	-12.99%
❌	Simulation	encode_varbin[(1000, 8)]	143.9 µs	161.6 µs	-10.98%
❌	Simulation	take_map[(0.1, 0.1)]	452.3 µs	517.1 µs	-12.53%
❌	Simulation	take_map[(0.1, 0.5)]	980.9 µs	1,134.5 µs	-13.54%
❌	Simulation	take_map[(0.1, 1.0)]	1.7 ms	2.2 ms	-24.02%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing os/like-stats (a3d0725) with develop (94d1f5a)}

[robert3005]

I have added a bail logic to the fsst dfa transform. It might be useful to apply the same fix there so we get support

[onursatici]

fsst dfa fix here: #8107