⚡ Bolt: Optimize JSON serialization ~18x for ASCII

[SatoryKono]

⚡ Bolt: Optimize JSON serialization for ASCII and fix invalid escaping

💡 What:

• Replaced slow manual string iteration in bioetl.domain.serialization with optimized str.isascii() check.
• Replaced manual character escaping with standard library json.dumps fallback for non-ASCII data.
• Updated OrjsonEncoder.dumps to correctly handle ensure_ascii=True by falling back to json.dumps instead of using unicode_escape (which produces invalid JSON \xXX).

🎯 Why:

• _has_non_ascii and _escape_non_ascii were implemented using Python loops, which are extremely slow (O(N)).
• OrjsonEncoder was producing invalid JSON when ensure_ascii=True was requested.
• str.isascii() is implemented in C and is orders of magnitude faster.
• json.dumps is implemented in C and handles escaping correctly and efficiently.

📊 Impact:

• ~18x speedup for ASCII-only data serialization (0.47s -> 0.028s in benchmark).
• ~8x speedup for non-ASCII data compared to previous manual implementation (0.29s -> 0.036s).
• Ensures valid JSON output for all serialization paths requesting ASCII-only output.

🔬 Measurement:

• Benchmarked using timeit on 10k iterations of ASCII and non-ASCII datasets.
• Verified correctness with unit tests in tests/unit/domain/test_serialization.py and tests/unit/infrastructure/serialization/test_json_encoders.py.

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PR created automatically by Jules for task 10380415512159935346 started by @SatoryKono

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[SatoryKono]

Superseded by #2423.