refactor(core): dedupe embedding imports and env parsing

src/secrets/shared.ts

@@ -9,6 +9,17 @@ export function isNonEmptyString(value: unknown): value is string {
   return typeof value === "string" && value.trim().length > 0;
 }
 
+export function parseEnvValue(raw: string): string {
+  const trimmed = raw.trim();
+  if (
+    (trimmed.startsWith('"') && trimmed.endsWith('"')) ||
+    (trimmed.startsWith("'") && trimmed.endsWith("'"))
+  ) {
+    return trimmed.slice(1, -1);
+  }
+  return trimmed;
+}
+
 export function normalizePositiveInt(value: unknown, fallback: number): number {
   if (typeof value === "number" && Number.isFinite(value)) {
     return Math.max(1, Math.floor(value));