feat(config): add config dump/logging with WithSummary option - #5
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Adds opt-in provenance tracking for configuration resolution, exposing what was loaded and from which source. Users can now inspect LoadSummary to debug config issues and understand source precedence. New public types: - LoadEntry: describes a resolved config field and its source - LoadSummary: collection of LoadEntry records New option: - WithSummary(&summary): populates summary with provenance info New source interface method: - Name() string: returns "env", "flag", or file path Implementation tracks per-key provenance during merge and appends LoadEntry records when fields are populated from sources or defaults. Includes 11 comprehensive test cases covering all source types, precedence, nested structs, and variable substitution.
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Adds opt-in provenance tracking for configuration resolution, exposing what was loaded and from which source. Users can now inspect LoadSummary to debug config issues and understand source precedence.
New public types:
New option:
New source interface method:
Implementation tracks per-key provenance during merge and appends LoadEntry records when fields are populated from sources or defaults. Includes 11 comprehensive test cases covering all source types, precedence, nested structs, and variable substitution.