release(0.4.11): merge main into dev and reconcile pubspec/CHANGELOG #346

Why

origin/main and origin/dev have diverged:

• Only on main (8): release/0.4.10 prep, tag bump 0.4.10+2, CI ci(release): fix Release workflow parse error for secrets in if #321, bumps 0.4.11+3 / 0.4.12+4
• Only on dev (27): product work enhancement(marketplace): extend SDUI RPC protocol with getCapabilities, getServerStats, getObjectDDL, and cancelQuery #323–feat(ui): harden empty workspace and shell overlays (#339) #340

dev pubspec is still 0.4.9+1 — incorrect vs Latest Release 0.4.10.

Tasks

• git checkout dev && git merge origin/main (resolve CHANGELOG/pubspec carefully)
• After merge: pubspec target for release work = 0.4.11+N (reset misleading 0.4.12 build if needed)
• Restore/keep [0.4.10] changelog from main; draft [0.4.11] from dev commits
• Push dev; ensure CI green

Parent epic: #341