• Default agent in Analytics and Analytics.development to
  AiAgent.detectAgentName(Platform.environment) when omitted.
• Tightened AiAgent.cursor detection in AiAgent.detectAgentName to check
  CURSOR_AGENT and CURSOR_EXTENSION_HOST_ROLE=agent-exec rather than
  TERM_PROGRAM=cursor or any CURSOR_* environment variable.
• Added Analytics.isBot to detect CI and bot environments from environment
  variables.