Add A2S probing, sd-bus state, tail/broadcast, and bot audit logclaude/trusting-dirac

State detection:
- Add STATE_STOPPING to ProcessState enum
- Replace system("systemctl is-active") with libsystemd sd-bus API for
  accurate starting/stopping/crashed state reporting; works for any unit
  type (RCON or STDIN) that declares a service: field
- Implement real A2S_INFO UDP queries (src/console/a2s.c) for units
  with health.type = a2s (Valve games: TF2, GMod); differentiates
  running / hibernating (0 players) / changing_map (A2S down, RCON up)
  / unreachable; includes player count and map name in responses
- Refactor probe_rcon_state() into probe_unit_state() returning a
  ProbeResult struct with state, players, max_players, map fields
- status and list responses now include players/max_players/map fields

New daemon commands:
- tail <unit>: return ring buffer snapshot as a single response
- broadcast <message>: send broadcast_cmd-formatted message to all
  running units; works for both RCON and STDIN console types

New YAML field:
- broadcast_cmd: command template (e.g. "say {msg}") — opt-in per
  unit; units without it are skipped by broadcast

CLI (umbrella-cli):
- Add tail subcommand (non-interactive output snapshot)
- Add broadcast subcommand
- status shows Players and Map when available
- list adds PLAYERS and MAP columns

Bot (umbrella-bot):
- Replace !attach / !detach with !tail (shows last 30 lines, no streaming)
- Add !broadcast command
- Write per-!cmd audit entries to /var/log/umbrella/bot-audit.log
- !units and !status responses include player counts when available

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/umbrella.h b/src/umbrella.h
index e44d626..2e9d440 100644
--- a/src/umbrella.h
+++ b/src/umbrella.h
@@ -45,6 +45,7 @@ typedef enum {
     STATE_STARTING = 1,
     STATE_RUNNING  = 2,
     STATE_CRASHED  = 3,
+    STATE_STOPPING = 4,
 } ProcessState;
 
 /* ── Action: a named script ──────────────────────────────────────────────── */
@@ -82,6 +83,7 @@ typedef struct {
     char name[MAX_NAME];
     char display[MAX_DISPLAY];
     char service[MAX_NAME];     /* systemd unit name, informational */
+    char broadcast_cmd[128];    /* command template for !broadcast, e.g. "say {msg}" */
     ConsoleConfig console;
     HealthConfig health;
     char log_paths[4][MAX_PATH];