feat(fastpass): Talos cluster provisioning and bootstrap

- Terraform: VM provisioning, Unifi DHCP, Technitium DNS
- talhelper: cluster config for 6-node Talos cluster
- Cilium 1.19.4 CNI with Talos-compatible security context
- docs: city-hall setup guide and bootstrap runbook

.gitignore

@@ -55,3 +55,9 @@ boilerplates/**/.env
 
 # Misc
 doppler-token.yaml
+
+# talhelper generated machine configs — contain secrets, never commit
+talos/talhelper/clusterconfig/
+# talenv.yaml plaintext — only commit the SOPS-encrypted version
+talos/talhelper/talenv.yaml
+!talos/talhelper/talenv.sops.yaml