chore(solana): silence devnet airdrop retry spam

Catch and swallow airdrop errors quietly. Logs were flooded with
429 retry messages. Now fails fast and lets DB-only credits take
over when devnet faucet is dry.

backend/src/services/solana.ts

@@ -56,20 +56,15 @@ export async function getTokenMint(): Promise<PublicKey | null> {
 
 		// Auto-create mint on devnet if authority exists
 		if (mintAuthority && RPC_URL.includes("devnet")) {
-			console.log("Auto-creating token mint on devnet...");
-
+			try {
 				// Fund mint authority with SOL first
 				const balance = await connection.getBalance(mintAuthority.publicKey);
 				if (balance < 500000000) {
-				console.log(
-					`Airdropping SOL to mint authority ${mintAuthority.publicKey.toBase58()}...`,
-				);
 					const signature = await connection.requestAirdrop(
 						mintAuthority.publicKey,
 						2 * 1000000000,
 					);
 					await connection.confirmTransaction(signature);
-				console.log("Airdrop complete");
 				}
 
 				const mintKeypair = Keypair.generate();
@@ -87,6 +82,10 @@ export async function getTokenMint(): Promise<PublicKey | null> {
 					`Add SOLANA_MINT_ADDRESS=${mint.toBase58()} to your .env to persist it`,
 				);
 				return mint;
+			} catch {
+				// Devnet faucet rate-limited, will use DB-only credits
+				return null;
+			}
 		}
 		return null;
 	} catch (error) {