fix(perps): clear clients when reconnect readiness fails

[abretonc7s]

Explanation

Addresses the reconnect-readiness finding raised in review on #9032; stacked on that branch.

#handleConnectionDrop constructs all four SDK clients beforeawait newWsTransport.ready(). The catch path left them in place, so a reconnect whose readiness rejected kept isInitialized() returning true. Callers gated on isInitialized() / ensureInitialized() then issued WebSocket-backed reads (getInfoClient, getSubscriptionClient) over a socket that never opened, instead of taking the uninitialized path. Writes were unaffected — ExchangeClient runs on the HTTP transport.

This clears the clients and both transports on failure, mirroring the cleanup initialize() already performs, before the retry is scheduled. The retry then rebuilds them from scratch as it already did.

Scope of the regression

Measured with a rejected ready() on the reconnect path:

Scenario	0837703 (before #9032)	branch tip 322eda6	with this change
plain drop after initialize()	isInitialized()true	true	false
after disconnect()	isInitialized()false	true	false

So the post-disconnect row is the behaviour change introduced by recreating all four clients on the reconnect path; the plain-drop row was already wrong before and is fixed here too.

Test

HyperLiquidClientService.test.ts gains two cases under the reconnection describe: readiness rejects after a plain initialize(), and after a disconnect(). Both assert isInitialized() === false (the first also asserts getSubscriptionClient() is undefined). Both fail on the branch without this change (Received: true) and pass with it.

Validation

• jest tests/src/services tests/src/providers — 34 suites, 1484 passed, 0 failed
• eslint on both changed files — clean

References

• Stacked on fix(perps): prevent CLIENT_NOT_INITIALIZED during reconnection and cold start #9032, follows fix(perps): ensure SDK clients before provider metadata read #9865

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Medium Risk
Touches WebSocket reconnection lifecycle in a critical trading client path; behavior change is narrow (fail-closed on failed ready) but affects when reads proceed after a bad reconnect.

Overview
Fixes a reconnect edge case where HyperLiquid SDK clients are built before WebSocketTransport.ready() completes. If ready() rejects, the catch path used to leave those clients in place, so isInitialized() stayed true even though the socket never opened—callers gated on initialization could issue WebSocket-backed reads on a dead connection instead of failing closed or retrying.

On reconnect failure, #handleConnectionDrop now clears all four SDK clients and both transports (with safe close() on the WS transport), matching the cleanup initialize() already does on failure, before scheduling the existing retry.

Tests cover readiness rejection after a normal initialize() and after disconnect(); both assert isInitialized() === false. Changelog updated under Fixed.

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Reconnect cleanup races subscription heal

Medium Severity

Clearing #subscriptionClient on reconnect readiness failure makes ensureSubscriptionClient treat the service as cold and call initialize during the retry backoff. That can mark the session Connected without running #onReconnectCallback, so the scheduled #handleConnectionDrop retry sees Connected and skips — leaving previously tracked subscriptions unrestored.

Additional Locations (2)

• packages/perps-controller/src/services/HyperLiquidClientService.ts#L352-L361
• packages/perps-controller/src/services/HyperLiquidClientService.ts#L1271-L1278

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