Interface manager remove listeners don't work with lambdas

[mrabine]

Description

removeLinkListener, removeAddressListener and removeRouteListener use target_type() / target() to find the callback to remove.
This only works with raw function pointers — lambdas and std::bind expressions each have a unique type and will never match, making removal silently ineffective.

Possible solution

Return an opaque ID from addListener() and accept that ID in removeListener():

auto id = manager.addLinkListener([](const LinkInfo& info) { ... });
manager.removeLinkListener(id);

Acceptance criteria

• Raw function pointers, std::bind expressions, and lambdas can all be removed via remove*Listener()
• Applies to LinkListener, AddressListener, and RouteListener