container: finance: add dependency checks for modules

Since modules are included upon build type, if a build doesn't support
a feature then that feature's dependencies will not be available.

This commit will give notice of those missing dependencies.

container/src/finance/lib/internal/lib_fetch.bash

@@ -831,17 +831,22 @@ function lib_fetch::__fetch_exec()
   #
 
   local _exec=()
-  [[ "$global_arg_tor" =~ ^on$|^true$ ]] && _exec+=("proxychains") # Wrap with proxychains
+  if [[ "$global_arg_tor" =~ ^on$|^true$ ]]; then
+    lib_utils::deps_check "proxychains"
+    _exec+=("proxychains") # Wrap with proxychains
+  fi
 
   # Test for Tor plugin
   if [ ! -z "${_exec[*]}" ]; then
+    lib_utils::deps_check "curl"
     if ! "${_exec[@]}" curl -s "https://check.torproject.org" &>/dev/null; then
       lib_utils::die_fatal "Tor plugin not started (or needs restart)"
     fi
   fi
 
   # TODO: remove no-limit after internal fetching writes per-paginated instead of per-fetch
-  _exec+=("/usr/bin/php" "-d" "memory_limit=\"-1\"" "-d" "include_path=\"/usr/local/lib:${_dir}\"")
+  lib_utils::deps_check "php"
+  _exec+=("php" "-d" "memory_limit=\"-1\"" "-d" "include_path=\"/usr/local/lib:${_dir}\"")
   lib_utils::print_debug "${_exec[@]}"
 
   #