feat(networking): migrate host services from ZeroTier to Tailscale

- replace legacy IP addresses with Tailscale MagicDNS names
- route Prometheus scraping and exporter firewall access through Tailscale
- wait for Tailscale before starting Prometheus
- restrict service UI ports to the Tailscale interface
- update PostgreSQL and Transmission access rules
- remove Jeeves ZeroTier configuration and Docker host overrides

systems/brain/services/home_assistant.nix

@@ -86,7 +86,7 @@
     esphome = {
       enable = true;
       openFirewall = true;
-      address = "192.168.90.35";
+      address = "0.0.0.0";
     };
   };
 }

systems/brain/services/postgress.nix

@@ -19,7 +19,7 @@
       local all  richie   trust
       host  all  richie   127.0.0.1/32    trust
       host  all  richie   ::1/128         trust
-      host  all  richie   192.168.90.1/24 trust
+      host  all  richie   100.64.0.0/10 trust
       host  all  richie   192.168.99.1/24 trust
 
       local vaninventory vaninventory trust
@@ -28,7 +28,7 @@
       local hass     hass     trust
 
       # ipv4
-      host  hass     hass     192.168.90.1/24 trust
+      host  hass     hass     100.64.0.0/10 trust
       host  hass     hass     127.0.0.1/32 trust
 
       # ipv6