chore: scaffold arcade-eval repo skeleton

config/targets.yaml

@@ -0,0 +1,20 @@
+# Shared, append-mostly. Live fixture identifiers recorded here as they're created.
+# Coordinate edits with `git pull --rebase` before push.
+
+endpoints:
+  api_base: https://api.arcade.st.dev
+  dashboard: https://dashboard.arcade.st.dev
+  coordinator: https://coordinator.arcade.st.dev
+  experience: https://experience.arcade.st.dev
+  mcp_url_pattern: https://api.arcade.st.dev/mcp/{slug}
+
+# slug -> {tools: [...], servers: [...], created_by, notes}   (filled in Phase 1)
+gateways: {}
+
+# name -> {kind: hosted|self-hosted, tools: [...], created_by, notes}   (filled in Task 1.4)
+servers: {}
+
+# Headless per-user identities (vault keys). Any stable string works.
+users:
+  A: user-a@servicetitan.com
+  B: user-b@servicetitan.com