chore(examples): accept argv override and bump RPC timeouts

Three small ergonomic fixes uncovered while running every learning
example end-to-end:

  copytrading/listen_wallet_transactions.py
    Was hardcoded to WALLET_TO_TRACK = "...". Now accepts argv[1] so
    you can run it without editing the file.

  pumpswap/get_pumpswap_pools.py
    Same pattern (TOKEN_MINT placeholder) and the underlying
    getProgramAccounts call would also time out at the default 30s
    on busy mainnet RPCs — bumped both AsyncClient timeouts to 120s.

  bonding-curve-progress/get_graduating_tokens.py
    Bumped RPC timeout 120s → 240s for the same reason. The threshold
    scan over all pump.fun bonding curves still occasionally exceeds
    even that on overloaded RPCs (it's a known-heavy query); a smaller
    threshold or memcmp-narrowed filter is the proper long-term fix.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

learning-examples/pumpswap/get_pumpswap_pools.py

@@ -18,13 +18,15 @@ load_dotenv()
 
 RPC_ENDPOINT = os.environ.get("SOLANA_NODE_RPC_ENDPOINT")
 PUMP_AMM_PROGRAM_ID = Pubkey.from_string("pAMMBay6oceH9fJKBRHGP5D4bD4sWpmSwMn52FMfXEA")
-TOKEN_MINT = Pubkey.from_string("...")
+import sys
+
+TOKEN_MINT = Pubkey.from_string(sys.argv[1] if len(sys.argv) > 1 else "...")  # argv[1] or hardcode
 
 
 async def get_market_address_by_base_mint(
     base_mint_address: Pubkey, amm_program_id: Pubkey
 ):
-    async with AsyncClient(RPC_ENDPOINT) as client:
+    async with AsyncClient(RPC_ENDPOINT, timeout=120) as client:
         base_mint_bytes = bytes(base_mint_address)
 
         # Define the offset for base_mint field
@@ -45,7 +47,7 @@ async def get_market_address_by_base_mint(
 
 
 async def get_market_data(market_address: Pubkey):
-    async with AsyncClient(RPC_ENDPOINT) as client:
+    async with AsyncClient(RPC_ENDPOINT, timeout=120) as client:
         response = await client.get_account_info(market_address, encoding="base64")
         data = response.value.data
         parsed_data = {}