Move inline code examples out of normative contracts

identifier-normalization, no-hardcoded-vendors,
vendor-installer-verification, and build-version-display follow the
go-database split: rules in contract.md, snippets in README.md. Routed
contract reads get cheaper; examples stay available on demand. Lint now
also rejects stale kit/patterns references.

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

rules/patterns/build-version-display/README.md

@@ -0,0 +1,29 @@
+# Build Version Display Pattern Notes
+
+This file keeps examples. The normative rules live in `contract.md`.
+
+## Frontend (JS/TS build tools)
+
+```ts
+// vite.config.ts / webpack.config.js
+define: {
+  __APP_VERSION__: JSON.stringify(process.env.APP_VERSION ?? "dev"),
+}
+
+// Footer component
+<footer>v{__APP_VERSION__}</footer>
+```
+
+## Go (server-rendered HTML)
+
+```go
+// main.go
+var Version = "dev"
+
+// Build: go build -ldflags "-X main.Version=1.4.2"
+```
+
+```html
+<!-- base template -->
+<footer>v{{ .Version }}</footer>
+```