Keyboard interfaces under Clients/GeViIO/GeViIO_01 should never have the
PTZ flag set on their video inputs. Previously PTZ cameras (e.g. 101027)
were exported with PTZ=True on every keyboard, unlike fixed cameras.
Adds geviset.disable_keyboard_ptz() and runs it at the end of the video
input pipeline in both /api/set/export and /api/batch/build. Only the
keyboard interfaces are touched; virtual decoders/servers under
GeViIO_Virtual keep their PTZ flags so PTZ control still works.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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