v28.0.0

• Consume SemanticConventions 13.1.2, including its compact analyzer catalog and shared legacy compiler polyfills.
• Remove the redundant service-collection activation wrapper and the unused DB-command operation-name binding; advance the generated-code ABI to V28.
• Remove metadata-only constructor property storage, the unused integration domain argument, and the obsolete method-name binding. Preserve Roslyn metadata uses with annotations on those exact protocol members.
• Remove redundant internal option state and obsolete empty contract allowlists. Runtime implementation claims now require runtime evidence without an exception list.
• Align source namespaces and folders, simplify confirmed inspection findings, and move negative generator fixtures into native MSTest diagnostics tests.