byte_length() expression

[myrrc]

This PR adds byte_length() expression for strings and blobs.
This PR does not allow byte_length pushdown for Duckdb's strlen()
due to SharedArray performance issues (will be added separately).

[codspeed-hq]

Merging this PR will improve performance by 29.54%

⚠️ 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.

⚡ 3 improved benchmarks
✅ 1510 untouched benchmarks

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	chunked_bool_canonical_into[(1000, 10)]	46.6 µs	31.8 µs	+46.85%
⚡	Simulation	chunked_varbinview_canonical_into[(1000, 10)]	198.2 µs	161.8 µs	+22.54%
⚡	Simulation	chunked_varbinview_into_canonical[(1000, 10)]	213.7 µs	176.9 µs	+20.8%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing myrrc/byte-length-expr (0cb6ecb) with develop (5e3aedb)}