v8.2.0

• feat: integrate harness runtime controls and release v8.2.0
• docs: record optimized Vec qualification
• chore: pin Code to optimized Vec candidate
• docs: refresh Vec migration qualification
• chore: refresh Code Vec dependency pin
• chore: pin Code to latest Vec candidate
• docs: bind final Vec qualification metrics
• test: assert revision conflicts stay non-degraded
• docs: bind CAS adapter evidence to main
• feat: add revision CAS to Vec workspace adapter
• docs: record latest Vec contract qualification
• refactor: keep vector budget types in workspace contract
• refactor: isolate workspace vector compatibility adapter
• feat: route workspace lexical search through Vec FTS
• fix: release Vec-primary shadow resources on close
• feat: add gated Vec-primary workspace authority
• docs: record clean Code rustdoc gate
• docs: refresh workspace Vec qualification evidence
• chore: advance workspace retrieval Vec pin
• docs: align v8.1 website hero copy