fix(hyperliquid): bump HL_DEPOSIT_LOOKBACK default to 7 days

[droplet-rl]

Summary

Bumps the HL_DEPOSIT_LOOKBACK default in HyperliquidExecutorConfig from 1 hour → 7 days, so the HyperliquidExecutor / HyperliquidFinalizer pod can survive a normal-cadence restart without losing visibility of in-flight SwapFlowInitialized events.

Failure mode this addresses

HyperliquidExecutor.initialize() (src/hyperliquid/HyperliquidExecutor.ts:187-194) anchors:

const fromBlock = await getBlockForTimestamp(this.logger, this.chainId, toBlock.timestamp - this.config.lookback);
this._dstSearchConfig = { to: toBlock.number, from: fromBlock, ... };

dstSearchConfig.from is fixed at startup and never advances backward. finalizeSwapFlows queries outstanding orders via that anchored window. So any SwapFlowInitialized older than (last_startup_ts − lookback) is permanently invisible to the running instance — no retry, no catch-up scan.

With the previous 1h default, any pod restart longer than ~1h after a SwapFlowInitialized event causes that flow to be dropped silently: the L1 limit order still fills, the SwapHandler retains the resulting finalToken, but finalizeSwapFlows is never called and the recipient never receives funds.

Production hit

Sponsored-OFT ETH → HyperCore deposit 0xc582a7440f1b…f380 (15,940 USDT0 → USDC, recipient 0xD103CC…7fb2).

• SwapFlowInitialized fired 2026-05-29 12:14:50 UTC, quoteNonce = 0xa5133bb1…b4a3, finalToken = 0xb88339cb…630f (USDC HyperEVM), via DstOFTHandler 0xeb8feE79…2284.
• L1 spot swap filled — SwapHandler 0x6aa49d33…602e now holds 15,937.39965114 USDC on HL spot.
• No SwapFlowFinalized ever emitted. User has 0 USDT0 on HL spot and never received the USDC.
• Same SwapHandler did finalise a smaller deposit (932 USDT0 → 931.07 USDC, recipient 0x85cfea68…) initiated 2026-05-30 00:21 UTC, processed 2.5 h later — consistent with the bot having restarted between the two events and the older one falling outside the 1h lookback.

Full investigation thread: https://app.slack.com/client/T90K0AL22/C0AQEHGS56Z/thread/C0AQEHGS56Z-1780148503.175839

Why 7 days

• Covers any realistic deploy / OOM / SIGHUP / cluster-maintenance window.
• HyperEVM blocks are ~1 s, so a 7-day startup scan is ~600k blocks paginated via CHAIN_MAX_BLOCK_LOOKBACK — one-time RPC cost on startup, no steady-state overhead.
• Still env-overridable (HL_DEPOSIT_LOOKBACK) for operators that want a different value.

Recovery for the stuck deposit

Once this lands and the HyperliquidFinalizer pod is restarted with the new default (or with HL_DEPOSIT_LOOKBACK ≥ ~96000), the bot should:

1. Pick up SwapFlowInitialized at quoteNonce 0xa5133bb1…b4a3.
2. Recompute limitOrderOut (≈ 15,932 USDC at current stable rates).
3. Bundle DstOFTHandler.finalizeSwapFlows(USDC, [0xa5133bb1…b4a3], [limitOrderOut]).
4. Emit SwapFlowFinalized; SwapHandler L1-spotSends to the user.

Pre-conditions to verify before relying on this path:

• Bot signer still holds PERMISSIONED_BOT_ROLE on DstOFTHandler 0xeb8feE79…2284.
• SwapHandler USDC inventory (15,937.40) ≥ recomputed limitOrderOut. Edge case if USDT0/USDC drifts notably above 1 before restart.
• No other outstanding orders ahead in the FIFO that would drain inventory first. Currently none.

If those don't hold, recovery falls back to an admin FUNDS_SWEEPER_ROLE sweep + manual L1 spotSend.

Follow-ups (not in this PR)

• Replace the startup-anchored window with a Redis-backed cursor so restarts can't lose history at all.
• Add a Datadog/relayer monitor: SwapFlowInitialized > 30 min ago AND no matching SwapFlowFinalized.
• Across UI (across-protocol/dapp) coherence patches for OFT/HyperCore deposits — separate work referenced in the Slack thread.

Test plan

• yarn typecheck — passes locally.
• yarn prettier --check on the edited file — clean.
• yarn eslint on the edited file — no warnings.
• Deploy to a non-prod / dev cluster, restart with default lookback, observe startup dstSearchConfig.from extends ≥ 7 days back.
• Restart prod HyperliquidFinalizer and watch for SwapFlowFinalized(0xa5133bb1…b4a3, 0xD103CC…7fb2, …) on DstOFTHandler 0xeb8feE79…2284.
• Confirm user 0xD103CC…7fb2 HL spot USDC balance increases by ≈ 15,937 USDC.

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