feat(pumpfun): migrate to buy_v2/sell_v2 and support non-SOL quote assets (#176)

Refresh the vendored IDLs from pump-fun/pump-public-docs @ 9c82f61 and move all
pump.fun trading onto the v2 instruction interface. This is required, not
optional: legacy buy/sell cannot trade coins paired against a quote asset other
than SOL, and USDC is already whitelisted in the on-chain Global account.

Protocol changes absorbed:

- buy_v2 (27 accounts) / sell_v2 (26 accounts) replace the legacy instructions.
  Every account is mandatory and the order is identical for all coins, so the
  conditional cashback/mayhem account lists are gone. Legacy remains available
  via PumpFunInstructionBuilder(use_legacy_instructions=True).
- BondingCurve is 151 bytes: virtual_sol_reserves -> virtual_quote_reserves,
  real_sol_reserves -> real_quote_reserves, plus quote_mint at offset 83. Old
  field names are kept as aliases so existing callers keep working.
- v2 instruction data drops the track_volume OptionBool; amounts are in the
  quote mint's raw units rather than always lamports.
- create_v2 carries a non-SOL quote mint as optional remaining accounts 17-19,
  and CreateEvent gained quote_mint, so extreme_fast_mode can resolve the quote
  asset without an extra fetch.

USDC support: new trade.quote_amounts and filters.allowed_quote_mints config,
accepting "sol"/"usdc" aliases or raw mints. Amounts are per-quote-mint because
1 USDC and 1 SOL are not interchangeable. A coin whose quote mint has no
configured amount is skipped rather than traded at the wrong size, so SOL-only
configs are unaffected.

Bug fixes found while verifying:

- The logs and blocks listeners set no websocket max_size, so any frame over
  1 MiB closed the connection with 1009 and the token in it was lost. Raised
  to 32 MiB.
- PumpSwap priced against the raw quote vault balance, ignoring the new
  Pool.virtual_quote_reserves (i128 at offset 245; live pools are 301 bytes).
  Upstream's note that this field is 0 everywhere is out of date: a live pool
  carries 17.58 SOL against a 148 SOL vault, a 10.15% price error.
- The seller read curve state once at confirmed commitment and silently fell
  back to create-time values, risking a stale creator_vault and ConstraintSeeds.
  It now retries at processed, matching the buyer.
- Account cleanup would burn wrapped SOL when force_burn was set, destroying
  value that closing the account returns. WSOL is now closed without burning.
- The mint scripts treated a landed transaction as a successful one, so a
  reverted buy printed as success. They now assert the on-chain result.

Compute unit limits retuned from mainnet measurements: buy 100k -> 180k,
sell 60k -> 120k. Mint-and-buy is no longer atomic, because create_v2 plus
buy_v2 exceeds the 1232-byte transaction limit; both mint scripts send two
transactions.

Adds learning-examples/pump_v2.py as one shared, standalone v2 toolkit for the
example scripts, and three verification scripts: an offline layout check
against the IDL, a no-funds mainnet simulation, and a live listener matrix that
buys, sells and closes the ATA per listener.

Verified on mainnet: all four listeners (geyser, logs, blocks, pumpportal) and
all eight example scripts completed a real buy, sell and ATA close, each
confirmed by reading the transaction result back rather than trusting
confirmation alone. The USDC path is verified structurally only; no USDC-paired
coin could be found on-chain to exercise it.

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

src/config_loader.py

@@ -188,6 +188,10 @@ def validate_config(config: dict) -> None:
         if "Missing required config key" not in str(e):
             raise
 
+    # Quote-asset configuration must resolve before the bot starts trading,
+    # otherwise a bad mint alias only surfaces on the first non-SOL coin.
+    validate_quote_config(config)
+
     # Platform-specific validation
     platform_str = config.get("platform", "pump_fun")
     try:
@@ -201,6 +205,35 @@ def validate_config(config: dict) -> None:
         raise
 
 
+def validate_quote_config(config: dict) -> None:
+    """Validate trade.quote_amounts and filters.allowed_quote_mints.
+
+    Args:
+        config: Loaded bot configuration
+
+    Raises:
+        ValueError: If a quote mint alias/address or amount is invalid
+    """
+    from core.pubkeys import resolve_quote_amounts, resolve_quote_mint
+
+    quote_amounts = config.get("trade", {}).get("quote_amounts")
+    if quote_amounts is not None:
+        if not isinstance(quote_amounts, dict):
+            raise ValueError(
+                "trade.quote_amounts must be a mapping of quote mint to amount"
+            )
+        resolve_quote_amounts(quote_amounts)
+
+    allowed = config.get("filters", {}).get("allowed_quote_mints")
+    if allowed is not None:
+        if not isinstance(allowed, list) or not allowed:
+            raise ValueError(
+                "filters.allowed_quote_mints must be a non-empty list of quote mints"
+            )
+        for mint in allowed:
+            resolve_quote_mint(mint)
+
+
 def validate_platform_config(config: dict, platform: Platform) -> None:
     """Validate platform-specific configuration requirements."""
     # Check if platform is supported