chore: replace em dashes with hyphens, add no-em-dash rule to CLAUDE.md

.gitea/workflows/release.yml

@@ -4,8 +4,8 @@ on:
     push:
         # A bare v* now this is its own repository. The old prefixed
         # vantagectl/v* tag existed to namespace one component's releases
-        # inside a shared repository, and unlike the agent's agent/v* — which
-        # the control plane greps release tag names for — nothing reads this
+        # inside a shared repository, and unlike the agent's agent/v* - which
+        # the control plane greps release tag names for - nothing reads this
         # one programmatically. Releases before the move keep their prefixed
         # tags in the monorepo's release list.
         tags:
@@ -80,7 +80,7 @@ jobs:
     # ran; ":latest, rebuilt whenever main moved" cannot be named after the
     # fact. It is a separate job from the binaries because it needs a
     # docker-capable runner rather than a Go one, and it does not need the
-    # binaries — the image builds from source in its own stage.
+    # binaries - the image builds from source in its own stage.
     image:
         runs-on: ubuntu-docker
         container: docker:dind
@@ -102,7 +102,7 @@ jobs:
                   echo "IMAGE_TAG=${VERSION#v}" >> $GITHUB_OUTPUT
 
             # The image build resolves the private vantage-shared module, so
-            # it needs a credential of its own — this job does not share the
+            # it needs a credential of its own - this job does not share the
             # build job's filesystem.
             - name: Write the module fetch credential
               run: |