fix: rename function calls to match agent-session.sh exports (#176)

kill_tmux_session → agent_kill_session
inject_into_session → agent_inject_into_session
wait_for_claude_ready → agent_wait_for_claude_ready

Also restore status() function lost during #160 refactor.

Fixes dev-agent and gardener-agent crash on startup:
  line 149: status: command not found
  line 280: kill_tmux_session: command not found

dev/dev-agent.sh

@@ -39,6 +39,11 @@ REPO_ROOT="${PROJECT_REPO_ROOT}"
 API="${CODEBERG_API}"
 LOCKFILE="/tmp/dev-agent-${PROJECT_NAME:-harb}.lock"
 STATUSFILE="/tmp/dev-agent-status"
+
+status() {
+  printf '[%s] dev-agent #%s: %s\n' "$(date -u '+%Y-%m-%d %H:%M:%S UTC')" "$ISSUE" "$*" > "$STATUSFILE"
+  log "$*"
+}
 LOGFILE="${FACTORY_ROOT}/dev/dev-agent.log"
 PREFLIGHT_RESULT="/tmp/dev-agent-preflight.json"
 BRANCH="fix/issue-${ISSUE}"
@@ -95,7 +100,7 @@ CLAIMED=false
 cleanup() {
   rm -f "$LOCKFILE" "$STATUSFILE"
   # Kill any live session so Claude doesn't run without an orchestrator attached
-  kill_tmux_session
+  agent_kill_session
   # If we claimed the issue but never created a PR, unclaim it
   if [ "$CLAIMED" = true ] && [ -z "${PR_NUMBER:-}" ]; then
     log "cleanup: unclaiming issue (no PR created)"