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Environment variable overrides with underscores in field names are not applied

Environment variable overrides with underscores in field names are not applied: a task in LegoFlow-SWE (Harbor dataset). When running the iggy server, environment variables prefixed with IGGY should override the corresponding configuration values, including fields whose names contain underscores…

The task

When running the iggy server, environment variables prefixed with `IGGY_` should override the corresponding configuration values, including fields whose names contain underscores. Currently, overrides work for simple hierarchical keys like `IGGY_SYSTEM_DATABASE_PATH` (maps to `system.database.path`), but they fail…

Part of Lego-X/LegoFlow-SWE.