0.7.6

Added

• act run --session-args '<json>': pre-open a single session at startup and
  serve the component as "session-of-1". Every call transparently uses the
  pre-opened session, the session machinery is hidden from clients (no MCP
  virtual open_session/close_session tools, no /sessions HTTP endpoints),
  and any client-supplied std:session-id is overridden. Requires a component
  that exports act:sessions/session-provider. (Previously --session-args
  was available only on act call for a single invocation.)