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/jeeves/services/grafana.nix

@@ -19,9 +19,9 @@ in
         secret_key = "$__file{${vars.secrets}/services/grafana/secret_key}";
       };
       server = {
-        http_addr = "192.168.90.40";
+        http_addr = "0.0.0.0";
         http_port = 3000;
-        root_url = "http://192.168.90.40:3000/";
+        root_url = "http://jeeves:3000/";
       };
     };
     provision = {

systems/jeeves/services/postgress.nix

@@ -27,7 +27,7 @@ in
       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
       host  all  richie   172.16.0.0/12   trust
 
@@ -42,12 +42,12 @@ in
       local postgres  math   trust
       host  postgres  math   127.0.0.1/32    trust
       host  postgres  math   ::1/128         trust
-      host  postgres  math   192.168.90.1/24 trust
+      host  postgres  math   100.64.0.0/10 trust
 
       local data_science_dev  math   trust
       host  data_science_dev  math   127.0.0.1/32    trust
       host  data_science_dev  math   ::1/128         trust
-      host  data_science_dev  math   192.168.90.1/24 trust
+      host  data_science_dev  math   100.64.0.0/10 trust
     '';
 
     identMap = ''

systems/jeeves/services/transmission.nix

@@ -21,11 +21,11 @@ in
       message-level = 3;
       peer-port = 51413;
       rpc-bind-address = "0.0.0.0";
-      rpc-host-whitelist = "127.0.0.1,192.168.90.40";
+      rpc-host-whitelist = "127.0.0.1,jeeves,jeeves.taile39c31.ts.net";
       rpc-host-whitelist-enabled = true;
       rpc-port = 9091;
       rpc-whitelist-enabled = true;
-      rpc-whitelist = "127.0.0.1,192.168.90.49";
+      rpc-whitelist = "127.0.0.1,100.*.*.*";
       seed-queue-enabled = false;
     };
   };