A call through an injected `Store` resolves to `Store.fetch()` — the
protocol requirement (#3673) — and the conforming `RemoteStore.fetch()`
is a separate node with nothing joining the two, so every directed walk
through an injected dependency stops at the protocol. Link the two with
the member-level `dispatches_to` edge C# already gets (#3003), under the
same single-conformer / single-owner guard: a protocol with two
conformers, a conformer with two same-named methods, or a default
implementation nobody overrides emits nothing.
The mechanism lives in graphify.interface_dispatch, lifted out of the
C# pass in the preceding refactor; swift_dispatch.py is the `.swift`
gate over it, registered right after the C# pass. Both ends of a pair
must be declared in a Swift file, so a Kotlin class naming the same
supertype never receives a Swift edge.
Known limit, pinned by test: a `class C: P` whose protocol is declared
in another file is classified `inherits` by the per-file classifier and
is not dispatched; struct/enum/actor conformers and `extension C: P`
are.
AI disclosure: Claude Code assisted with this change.
(cherry picked from commit 0ca5c71b1c)
