Upload alpha_factory/personas/expression_compiler.py

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fix: expression_compiler v4 — strip quotes from fields, post-compile validation, wire novel groups, fix all known issues"

fix: add explicit operator arities to LLM compiler prompt — prevents 'Invalid number of inputs' BRAIN errors"

feat: expression_compiler v2 — new archetypes for model77 SUE/PEAD, supply chain, analyst guidance, PCR contrarian + auto field-aware backfill/sign"

Fix pipeline: enforce ts_decay_linear on all expressions + flip short-horizon returns to reversal"

Fix expression_compiler: use tier instead of hardcoded model name"

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