chore(release): bump workspace to v1.1.1 + CHANGELOG

- Workspace package version: 1.1.0 → 1.1.1 (patch under the
  post-1.0 expansion-phase carve-out in docs/versioning.md)
- Rhai SDK version: 1.1 → 1.2 — minor bump, additive only.
  New surfaces: kv::*, dead_letters::*, ctx.event.
- Dashboard package version: 0.6.0 → 0.7.0 for the dead-letters UI.
- HTTP API version stays at 1 (additive: trigger CRUD, dead-letter
  admin endpoints, dispatch_mode field on routes).
- Schema version: 6 → 12 (migrations 0007–0012).

CHANGELOG.md created at the repo root following the convention from
prior bumps (release commits + design-notes references).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Cargo.toml

@@ -13,7 +13,7 @@ members = [
 ]
 
 [workspace.package]
-version = "1.1.0"
+version = "1.1.1"
 edition = "2021"
 rust-version = "1.92"
 license = "MIT OR Apache-2.0"