v3.0.0

[3.0.0] - 2026-07-29

🚀 Features

• (session) Add SessionBagInterface as the single session seam
• (session) [breaking] Make the PSR-7 session stack selectable, and harden it
• (middleware) Select the PSR-7 session stack when the slot is configured
• (session) [breaking] Remove the ext/session storage stack
• (session) Ship a slot factory for every session backend

🐛 Bug Fixes

• (storage) Release the read cursor in the PDO session backends
• (session) Release the load cursor and make the PDO upsert portable
• (storage) [breaking] Repair the native session lifecycle under worker runtimes
• (core) [breaking] Persist request state before the session is closed
• (user) [breaking] Only write session state that actually changed

🚜 Refactor

• (middleware) Resolve session ids through the bag, and narrow types
• (packages) [breaking] Extract the cloud clients into cloud-* packages

📚 Documentation

• Add MIGRATING.md, and a PDO factory for the session slot
• Target MIGRATING.md at a single 3.0 release

🧪 Testing

• (runtime) Prove session identity survives across worker requests
• (runtime) [breaking] Cover FrankenPHP in the worker integration suite

⚙️ Miscellaneous Tasks

• Add scheduler to the subtree splitter
• Keep DOCS_TODO.md contributor-local