analyze_swift_types treated any symbol containing `_Tt` as a Swift
observation, and get_objc_protocols treated any symbol containing `_TtP` as a
protocol, so Objective-C method labels and message-send shims for selectors
such as `_TtReset` or `_TtPing` were reported as Swift names or protocols.
Recognize an embedded legacy runtime name only when `_Tt` is followed by
nominal kind markers and an identifier length or the `s` module, owned by
the Swift classifier and reused by protocol discovery.
Fixes#5576Fixes#5580
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>