fix: reconstruct nested dataclass lists in MC _dict_to_config (#12)

[gtx20060124-bot]

Summary

Fixes 4/18 Monte Carlo tests that fail with:

AttributeError: dict object has no attribute volume_usd_m0

Root cause

mc_run round-trips SimConfig through _dataclass_to_dict and back through _dict_to_config. The reconstruct step did a flat setattr, destroying nested List[RevenueStream] and List[VestBucket] — they became flat dicts instead of dataclass objects.

Fix

• Detect list fields whose originals are dataclass lists
• Recursively reconstruct via _dict_to_dataclass helper
• Also handles nested dict → dataclass reconstruction

Closes kcolbchain/token-simulator #12

[abhicris]

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[abhicris]

🤖 Audit verdict: safe

Code adds legitimate nested dataclass reconstruction logic with no malicious intent, credential leakage, or security vulnerabilities.

Audited by the kcolbchain PR pipeline. See pipeline docs.

[abhicris]

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