feat(replay): pool-state tape covers every exact-curve venue

[eeiaao]

Extends the pool-state tape (#399, #400, #404) to the remaining exact-curve venues, so a StableSwap, Weighted, Cryptoswap, or Meteora DLMM pool can be recorded and replayed as a delta log too — until now those curves were backtest-only and their pool history had no tape format.

What changed:

• PoolVenue grows StableSwap / Weighted / Cryptoswap / MeteoraDlmm, plus isBalancesShaped. Each venue gets a shaped Descriptor (its static parameters) and Checkpoint: the full balance vector for the n-token pools, the bin book + volatility-accumulator state for DLMM. Cryptoswap's price scale rides in its Checkpoint, not the Descriptor — the chain repegs it, so it is state, and a repeg between checkpoints re-anchors instead of corrupting the replay.
• A new n-token SwapDelta (swapN) names its (i, j) pair explicitly, distinguished from the directional record by payload size, so old tapes replay unchanged. On the pair the connector presents it prints a trade; off it (a 3pool USDC→USDT swap while the connector presents DAI/USDC) the shared state still moves and the book republishes, with no trade on the symbol.
• MeteoraDlmmCurve::applySwap now actually moves the bin reserves it quotes from: the walk records per-bin fills and the apply adds each bin's net input and removes its output. This matches the program's Bin::swap exactly — amount_into_bin = amount_in_with_fees - fee, the whole fee (LP share included) stays out of amount_x/amount_y as claimable — verified against the lb_clmm source, so a replayed bin book matches an on-chain readback to the unit. The curve also exposes the checkpoint surface a recorder needs (activeId, bins, volatility, timestamp).
• The drift check compares every balances() entry, not just the first two, so an n-token pool's unobserved mutation on any coin is caught.

Validation:

• Round-trip tests per venue against an independently-applied curve: 3pool StableSwap (including an off-pair swap moving state without a trade print), an 80/20 Weighted pool through the directional record, tricrypto Cryptoswap re-anchoring its price scale, and a DLMM swap walking bins down with the closing checkpoint captured off the expected post-state. Plus a balances-shaped drift test.
• The DLMM curve test now asserts the post-apply reserves (output leaves exactly as quoted, input lands net of fee, the active bin moved).
• Existing CP / CLMM round-trip, drift, and unknown-record tests unchanged and green; full suite 126/126.

MCP impact

None. No public binding surface change; docs FTS index regenerated.

W23-T001