v5.4.4

Fixed

• sn session-start banner is now backend-agnostic. The compact Serena
  reminder injected at session start still hardcoded the jet_brains_ tool
  prefix (jet_brains_find_symbol … jet_brains_rename), the same hardcoding
  the 5.4.3 grep→Serena redirect fix removed. A 5.4.3 post-release shakeout
  caught that the banner edit was never committed in 5.4.3 (only the grep-hook
  message landed). The banner now uses bare capability names and notes the
  prefix varies by backend (JetBrains prefixes jet_brains_, LSP is
  unprefixed), matching the redirect message and the serena-code-nav skill.