Propagate Express global middleware and catch-all routes

[bjcorder]

Summary

• Propagate prefix-less app.use and router.use middleware only to later routes on the same receiver, preserving source registration order.
• Carry preceding app/router global middleware through mount composition.
• Emit terminal app.all handlers as ANY routes while retaining non-terminal middleware-factory calls as middleware context.
• Keep unknown global middleware conservative: it remains middleware context with a route note rather than fabricated authorization evidence.
• Add adapter, pipeline, fixture, JSON golden, Markdown golden, and documentation coverage.

Verification

• cargo check --workspace --all-targets --locked
• cargo test --workspace --all-targets --locked

Closes #109