DEVX-6: fix: correct version tags, changelog, and release script recovery

cliff.toml

@@ -39,8 +39,8 @@ sort_commits = "oldest"
 recurse_submodules = false
 
 commit_preprocessors = [
-    # Strip DEVX-N task ID prefix from merge commits so git-cliff sees conventional commits
-    { pattern = "^DEVX-\\d+\\s+", replace = "" },
+    # Strip DEVX-N: task ID prefix from squash-merge commits so git-cliff sees conventional commits
+    { pattern = "^DEVX-\\d+:\\s+", replace = "" },
 ]
 
 commit_parsers = [
@@ -66,3 +66,6 @@ commit_parsers = [
 features_always_bump_minor = true
 breaking_always_bump_major = false
 initial_tag = "0.1.0"
+# Refactor commits bump patch — structural changes to src/ or pyproject.toml
+# affect users even though no new feature was added.
+refactor_always_bump_patch = true