chore: exit pre mode, clean stale changesets for 0.5.0 release

小橘 🍊

.changeset/env-api-unify.md

@@ -1,5 +0,0 @@
----
-"@uncaged/workflow-util": patch
----
-
-Replace optionalEnv/requireEnv with unified env(name, fallback) API

.changeset/fix-internal-deps.md

@@ -1,5 +0,0 @@
----
-"@uncaged/workflow-protocol": patch
----
-
-fix: correct internal dependency versions for prerelease

.changeset/fix-publish-src.md

@@ -1,5 +0,0 @@
----
-"@uncaged/workflow-util-agent": patch
----
-
-fix: include create-agent-adapter.ts in published src

.changeset/fix-workspace-deps.md

@@ -1,5 +0,0 @@
----
-"@uncaged/workflow-protocol": patch
----
-
-fix: use npm publish with pinned deps instead of bun publish (workspace:^ resolution bug)

.changeset/pre.json

@@ -1,5 +1,5 @@
 {
-  "mode": "pre",
+  "mode": "exit",
   "tag": "alpha",
   "initialVersions": {
     "@uncaged/cli-workflow": "0.4.5",

.changeset/rfc-252-agent-fn.md

@@ -1,5 +0,0 @@
----
-"@uncaged/workflow-protocol": minor
----
-
-feat: AgentFn<Opt> type boundary and createAgentAdapter bridging function (RFC #252)

packages/workflow-util/CHANGELOG.md

@@ -1,78 +0,0 @@
-# @uncaged/workflow-util
-
-## 0.5.0-alpha.4
-
-### Patch Changes
-
-- Replace optionalEnv/requireEnv with unified env(name, fallback) API
-- Updated dependencies [f74b482]
-- Updated dependencies [f74b482]
-  - @uncaged/workflow-protocol@0.5.0-alpha.4
-
-## 0.5.0-alpha.3
-
-### Patch Changes
-
-- Updated dependencies
-  - @uncaged/workflow-protocol@0.5.0-alpha.3
-
-## 0.5.0-alpha.2
-
-### Patch Changes
-
-- Updated dependencies
-  - @uncaged/workflow-protocol@0.5.0-alpha.2
-
-## 0.5.0-alpha.1
-
-### Patch Changes
-
-- @uncaged/workflow-protocol@0.5.0-alpha.1
-
-## 0.5.0-alpha.0
-
-### Patch Changes
-
-- Updated dependencies
-  - @uncaged/workflow-protocol@0.5.0-alpha.0
-
-## 0.4.5
-
-### Patch Changes
-
-- Updated dependencies
-  - @uncaged/workflow-protocol@0.4.5
-
-## 0.4.4
-
-### Patch Changes
-
-- Updated dependencies
-  - @uncaged/workflow-protocol@0.4.4
-
-## 0.4.3
-
-### Patch Changes
-
-- Include src/ in published packages so bun runtime can resolve the 'bun' exports condition.
-- Updated dependencies
-  - @uncaged/workflow-protocol@0.4.3
-
-## 0.4.2
-
-### Patch Changes
-
-- Fix workspace dependency resolution: use workspace:^ so published packages resolve to compatible versions instead of exact (non-existent) versions.
-- Updated dependencies
-  - @uncaged/workflow-protocol@0.4.2
-
-## 0.4.0
-
-### Minor Changes
-
-- Fix package exports for published packages and adopt changesets for version management.
-
-### Patch Changes
-
-- Updated dependencies
-  - @uncaged/workflow-protocol@0.4.0