Explicit `_ =` discards beat silently-unused async return values

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When a Supabase try await .execute() returns PostgrestResponse<Void> and you don't care about the payload, the compiler warns 'Expression of type PostgrestResponse<Void> is unused' — and that warning fails the build under strict settings. Prefix the call with _ = to make the discard intentional rather than accidental. The pattern applies to any async function returning a response type you deliberately throw away: signal intent, don't hope the compiler infers it.

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