fix: return reply in async handlers

[LeanidShutau]

Fixes #292 by returning reply object from async Fastify handlers where it's missing.
According to the Fastify docs, reply must be returned from async handler to avoid race conditions.

[changeset-bot]

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Latest commit: c31e395

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[mcollina]

lgtm

[onlywei]

It looks like the CI jobs are failing to install pnpm.

[onlywei]

It looks like the CI jobs are failing to install pnpm.

I fixed this issue. @LeanidShutau Can you try rebasing and pushing again to run the CI?

[LeanidShutau]

It looks like the CI jobs are failing to install pnpm.

I fixed this issue. @LeanidShutau Can you try rebasing and pushing again to run the CI?

@onlywei The fix is not merged into dev yet, so my branch is up-to-date