container: fetch: refactor for php

- Refactors locations for internal `fetch` impl and deps (composer)
  * A softer hardcoding without the need for a new autoloader
  * A restructured solution to silence the linter (phpstan)

NOTE: variables are prepended with *_PHP_* as to not bring confusion
with any other `dfi` dependencies or the `dfi` `root` module (C++).

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

@@ -833,7 +833,13 @@ function lib_fetch::__fetch_exec()
   [ -z "$_type" ] && lib_utils::die_fatal
   [ -z "$_subtype" ] && lib_utils::die_fatal
 
-  local _dir="${DOCKER_FINANCE_CONTAINER_REPO}/src/finance/lib/internal/fetch"
+  # `fetch` deps location (PHP)
+  local _deps="/usr/local/lib/php"
+
+  # `fetch` impl location (PHP)
+  local _impl="${DOCKER_FINANCE_CONTAINER_REPO}/src/finance/lib/internal/fetch"
+
+  # NOTE: must reset IFS after executing
   local _ifs="$IFS"
   IFS=' '
 
@@ -857,14 +863,14 @@ function lib_fetch::__fetch_exec()
 
   # TODO: remove no-limit after internal fetching writes per-paginated instead of per-fetch
   lib_utils::deps_check "php"
-  _exec+=("php" "-d" "memory_limit=\"-1\"" "-d" "include_path=\"/usr/local/lib:${_dir}\"")
+  _exec+=("php" "-d" "memory_limit=\"-1\"" "-d" "include_path=\"${_deps}:${_impl}\"")
   lib_utils::print_debug "${_exec[@]}"
 
   #
   # Execute fetch
   #
 
-  "${_exec[@]}" "${_dir}/fetch.php" "$_type" "$_subtype"
+  __DFI_PHP_DEPS__="${_deps}" __DFI_PHP_ROOT__="${_impl}" "${_exec[@]}" "${_impl}/fetch.php" "$_type" "$_subtype"
   IFS="$_ifs"
 }