Function resolveValidateAtVersion

resolveValidateAtVersion(
    flags: ValidateFlags,
    config?: DynamodbPluginConfig,
    ref?: EnvRef,
): ResolvedValidateAtVersion
Resolve CLI flags + plugin config into validate-table-definition inputs.

Expansion policy:
- Config strings are already interpolated by the host (do not re-expand).
- Runtime flags are expanded once using get-dotenv's dotenvExpand.
- Expansion reference is { ...process.env, ...ref } (ctx wins).
Parameters
- flags: ValidateFlags
  Parsed CLI flags.
- Optionalconfig: DynamodbPluginConfig
  Plugin config slice (already interpolated by host).
- ref: EnvRef = process.env
  Env reference (typically ctx.dotenv).
Returns ResolvedValidateAtVersion
Resolved version and layout config.
- Defined in src/get-dotenv/cli/options/validate.ts:32