fix: use /v1 endpoint for FlareSolverr API

FlareSolverr v3.x uses /v1 endpoint, not root /.
The previous implementation was hitting the root endpoint which
returned 405 Method Not Allowed.

src/lib/services/flare-solver.ts

@@ -1,11 +1,13 @@
 const FLARESOLVERR_URL =
 	process.env.FLARESOLVERR_URL ?? "http://localhost:8191";
 
+const FLARESOLVERR_API = `${FLARESOLVERR_URL}/v1`;
+
 export async function fetchWithFlareSolver(
 	url: string,
 	timeout = 30000,
 ): Promise<string> {
-	const res = await fetch(FLARESOLVERR_URL, {
+	const res = await fetch(FLARESOLVERR_API, {
 		method: "POST",
 		headers: { "Content-Type": "application/json" },
 		body: JSON.stringify({