chore: slow release cadence — patch bumps by default

Post-1.1.0, feat commits no longer drive minor bumps on every release:
versioning switches to always-bump-patch, so the next release is 1.1.1
regardless of commit types. Minor/major releases become deliberate
decisions via a Release-As footer (same mechanism used to cut 1.0.0).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

release-please-config.json

@@ -8,7 +8,7 @@
       "tag-separator": "",
       "include-v-in-tag": true,
       "changelog-path": "CHANGELOG.md",
-      "versioning": "default",
+      "versioning": "always-bump-patch",
       "extra-files": [
         {
           "type": "toml",