docs: public-readiness — vibe-coded disclosure + genericize internal hosts

- README + CLAUDE.md: upfront "this is a vibe-coded project" disclosure for
  going public.
- Replace internal LAN hostnames (*.orgrimmar.dudenhoeffer.casa) with
  example.com across README, ADR-0004, the envproviders example, and env_test.go
  (assertions updated together; suite still green). Token was already a
  "change-me" placeholder, not a real secret.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

env_test.go

@@ -21,8 +21,8 @@ func TestParseDSN(t *testing.T) {
 		wantErr error
 	}{
 		{
-			raw:  "foreman://test-token-change-me@foreman-m1.orgrimmar.dudenhoeffer.casa",
-			want: DSN{Scheme: "foreman", Token: "test-token-change-me", Host: "foreman-m1.orgrimmar.dudenhoeffer.casa"},
+			raw:  "foreman://test-token-change-me@foreman-m1.example.com",
+			want: DSN{Scheme: "foreman", Token: "test-token-change-me", Host: "foreman-m1.example.com"},
 		},
 		{
 			raw:  "ollama://my-host.example:11434",
@@ -66,8 +66,8 @@ func TestDSNBaseURL(t *testing.T) {
 func TestLoadEnvForeman(t *testing.T) {
 	r := newTestRegistry(t)
 	err := r.LoadEnv(map[string]string{
-		"LLM_M1": "foreman://test-token-change-me@foreman-m1.orgrimmar.dudenhoeffer.casa",
-		"LLM_M5": "foreman://test-token-change-me@foreman-m5.orgrimmar.dudenhoeffer.casa",
+		"LLM_M1": "foreman://test-token-change-me@foreman-m1.example.com",
+		"LLM_M5": "foreman://test-token-change-me@foreman-m5.example.com",
 	})
 	if err != nil {
 		t.Fatalf("LoadEnv: %v", err)
@@ -85,7 +85,7 @@ func TestLoadEnvForeman(t *testing.T) {
 		if op.Name() != name {
 			t.Errorf("provider name = %q, want %q", op.Name(), name)
 		}
-		wantURL := "https://foreman-" + name + ".orgrimmar.dudenhoeffer.casa"
+		wantURL := "https://foreman-" + name + ".example.com"
 		if op.BaseURL() != wantURL {
 			t.Errorf("provider %q baseURL = %q, want %q", name, op.BaseURL(), wantURL)
 		}