docs: apply reviewed wiki editorial corrections
docs: clarify access control architecture and RIO integration
docs: apply wiki editorial audit findings Apply 107 findings across 49 pages, including revised wording, sentence case headings, and event terminology. Leave the deferred MP4 metadata finding unchanged.
docs: add RIO appliance prep, CardCode encoding, and entity discovery
docs: apply style fixes to RIO guides
docs: add Synergis RIO integration guides