Release v2.0.20

v2.0.20

Spec-driven development doc; NotificationChannelsPass Symfony 8.1 detection
refinement.

See docs/CHANGELOG.md.

Changelog

Added

• Documentation – SPEC-DRIVEN-DEVELOPMENT.md: product spec, user stories, and REQ-* traceability for maintainers; linked from root README and ENGRAM.md.

Changed

• Symfony 8.1 – NotificationChannelsPass detects the TaggedIteratorArgument constructor by the third parameter name (needsIndexes) instead of reflection type, so tagged notification channels stay wired correctly across Symfony versions.

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Commits

• Release v2.0.20: changelog and upgrading for spec docs and DI pass (ee1f867)
• Refactor NotificationChannelsPass to align with Symfony 8.1 changes (2ea1148)
• Add Spec-driven development documentation (d4f75cc)