Enhance LintSpdxCommand with contributor tracking and header normalization

Improves SPDX header linting to ensure consistent license metadata across
the codebase.

Key changes:

- Enforce deterministic tag ordering (License-Identifier, FileCopyrightText,
  FileContributor) to ensure consistency, prevent merge conflicts, and
  simplify code reviews

- Add contributor alias mapping to consolidate contributors with multiple
  emails or name variations (e.g., "nickl-" → "Nick Lombard")

- Add --contributions-strategy option with "blame" (current code authors)
  and "log" (all historical contributors) to support different attribution
  philosophies

- Add optional path argument to lint specific files or directories

- Add --fix option to automatically correct header issues

Assisted-by: Claude Code (claude-opus-4-5-20251101)

Author: henriquemoody

bin/console

@@ -44,7 +44,7 @@ return (static function () {
         new ValidatorChangelogLinter(),
     )));
     $application->addCommand(new LintMixinCommand($differ));
-    $application->addCommand(new LintSpdxCommand());
+    $application->addCommand(new LintSpdxCommand($differ));
     $application->addCommand(new UpdateDomainSuffixesCommand($dataSaver));
     $application->addCommand(new UpdateDomainToplevelCommand($dataSaver));
     $application->addCommand(new UpdatePostalCodesCommand($dataSaver));