Force embedded-postgres messages locale to C

The vendor package still hardcoded LC_MESSAGES to en_US.UTF-8.
That locale is missing in slim containers, and initdb fails during
bootstrap even when --lc-messages=C is passed later.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

patches/embedded-postgres@18.1.0-beta.16.patch

@@ -2,9 +2,19 @@ diff --git a/dist/index.js b/dist/index.js
 index ccfe17a82f4879bf20cc345c579a987d9eba5309..dd689f5908f625f49b4785318daea736aa88927f 100644
 --- a/dist/index.js
 +++ b/dist/index.js
+@@ -24,7 +24,7 @@ const { Client } = pg;
+  * output of the `initdb` command to see if Postgres is ready. As we're looking
+  * for a particular string, we need to force that string into the right locale.
+  * @see https://github.com/leinelissen/embedded-postgres/issues/15
+  */
+-const LC_MESSAGES_LOCALE = 'en_US.UTF-8';
++const LC_MESSAGES_LOCALE = 'C';
+ // The default configuration options for the class
+ const defaults = {
+     databaseDir: path.join(process.cwd(), 'data', 'db'),
 @@ -133,7 +133,7 @@ class EmbeddedPostgres {
-                     `--pwfile=${passwordFile}`,
+                      `--pwfile=${passwordFile}`,
-                     `--lc-messages=${LC_MESSAGES_LOCALE}`,
+                      `--lc-messages=${LC_MESSAGES_LOCALE}`,
                      ...this.options.initdbFlags,
 -                ], Object.assign(Object.assign({}, permissionIds), { env: { LC_MESSAGES: LC_MESSAGES_LOCALE } }));
 +                ], Object.assign(Object.assign({}, permissionIds), { env: Object.assign(Object.assign({}, globalThis.process.env), { LC_MESSAGES: LC_MESSAGES_LOCALE }) }));