fix: resolve all syntax errors in provisioning modules

Fixed 29 syntax errors across 4 modules:
- servers/ (6 files, 13 errors): Fixed parentheses in PROVISIONING_ARGS expressions
- taskservs/ (4 files, 6 errors): Fixed parentheses in string interpolation
- main_provisioning/ (3 files, 3 errors): Fixed environment variable access
- lib_provisioning/utils/ (2 files, 2 errors): Fixed standalone env access

Pattern fixed:
- $"($env.PROVISIONING_ARGS? | default "") " → $"(($env.PROVISIONING_ARGS? | default "")) "
- $env.PROVISIONING_ARGS? | default "" → ($env.PROVISIONING_ARGS? | default "")

All modules now have valid Nushell syntax for proper parsing.

core/nulib/lib_provisioning/utils/help.nu

@@ -6,7 +6,7 @@ export def parse_help_command [
   --end
 ] {
   #use utils/interface.nu end_run
-  let args = $env.PROVISIONING_ARGS? | default ""
+  let args = ($env.PROVISIONING_ARGS? | default "")
   let has_help = if ($args | str contains "help") or ($args |str ends-with " h") { 
     true
   } else if $name != null and $name == "help" or $name == "h" { 

core/nulib/lib_provisioning/utils/init.nu

@@ -23,7 +23,7 @@ export def provisioning_init [
     let cmd_line: list<string> = if ($args| length) == 0 {
         $args | str join " "
     } else {
-        $env.PROVISIONING_ARGS? | default ""
+        ($env.PROVISIONING_ARGS? | default "")
     }
     let cmd_args: list<string> = ($cmd_line | str replace "--helpinfo" "" |
        str replace "-h"  "" | str replace $module "" | str trim | split  row " "