refactor(durably): move scope middleware wiring into durably()

[taras]

Motivation

durably() already installs reducer middleware on its scope, but scope lifecycle middleware was installed indirectly inside DurableReducer.installScopeMiddleware(). This split middleware wiring across two modules and made the entrypoint/setup boundary less clear.

The halt-related tests were also relying on immediate halt after spawn in a few places, which can halt a task before it reaches suspend().

Approach

• Refactor DurableReducer.installScopeMiddleware() into createScopeMiddleware(runScope) that returns the same scope middleware handlers while keeping reducer lifecycle/replay logic encapsulated.
• Install scope middleware explicitly in durably() with scope.around(api.Scope, ..., { at: "max" }), so durably() owns all scope wiring.
• Keep root scope registration/recording behavior inside the reducer middleware factory.
• Update halt tests to spawn durable operations and yield once before halting so tasks reliably reach suspend().
• Skip the known test for finally-on-halt error propagation pending upstream Effection behavior fix.
• Include current local effection override updates in package.json and pnpm-lock.yaml from the working tree state.

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