EnvironmentConfigProvider

A configuration provider that retrieves values from environment variables.

Converts a key/environment segment to uppercase (via ) and flattens separators by replacing '.' and '-' with a single '_'. Used for legacy flat environment-variable lookup.

Converts a key to uppercase (via ), splits on '.' and '-' as hierarchical delimiters, removes empty segments, and joins segments using "__". Used for hierarchical environment-variable lookup while preserving path boundaries.