devel/py-schematics-patched: Deprecate/Set to expire

• Upstream is inactive since +8 years and there are no more consumers left in the tree.

• Bump PORTREVISION to force a rebuild so that users get informed about the deprecation.

MFH: 2026Q3
(cherry picked from commit e4ce5a57d22cb3996a10d845bc7c56c3f700138c)