feat: per-call LLM timing, speaker ID, cancel captures on leave

- llm.py: log each Ollama call's caller + total/load/prompt/gen durations
  so a slow voice turn is attributable to a specific internal call
  (router/enrichment/digest/main); a RELOAD marker flags cold reloads.
- voice.ts: track in-flight Opus captures and abort them on session
  destroy(); drop any utterance that finishes after the user left, so no
  trailing post-leave VAD turns are reported.
- userbot.ts: show the speaker's Discord user ID on each transcript line
  (answered and dropped) so it's clear whose audio produced the turn.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

bot/src/userbot.test.ts

@@ -53,6 +53,14 @@ test("formatTurnMessage reports a dropped turn with only the listening stage", (
   expect(msg).not.toContain("🔊 TTS");
 });
 
+test("formatTurnMessage shows the speaker user ID when provided", () => {
+  const answered = formatTurnMessage({ user: "12345", transcript: "안녕", reply: "하이" });
+  expect(answered).toContain("👤 12345");
+  const dropped = formatTurnMessage({ user: "67890", transcript: "", reply: "", note: "음성 아님(VAD 차단)" });
+  expect(dropped).toContain("👤 67890");
+  expect(dropped).toContain("❌ 음성 아님(VAD 차단)");
+});
+
 test("formatTurnMessage falls back to the plain line when no timing is present", () => {
   const msg = formatTurnMessage({ transcript: "안녕", reply: "하이" });
   expect(msg).toBe('🎤 들음 → 🗣️ "안녕"\n🤖 답변: 하이');

bot/src/userbot.ts

@@ -35,6 +35,9 @@ async function loadSelfbot(): Promise<any> {
 }
 
 export interface TurnInfo {
+  /** Discord user ID of the speaker, so the transcript shows whose audio
+   *  produced each turn (and which user a dropped/VAD turn belongs to). */
+  user?: string;
   transcript: string;
   reply: string;
   note?: string;
@@ -69,9 +72,10 @@ function durSec(a?: number, b?: number): string | null {
  *  timing breakdown (listening / LLM / TTS) with start→end wall-clock times and
  *  durations, so it's obvious what took long. Pure + exported for testing. */
 export function formatTurnMessage(info: TurnInfo): string {
+  const who = info.user ? `👤 ${info.user}  ` : "";
   const head = info.transcript
-    ? `🎤 들음 → 🗣️ "${info.transcript}"\n🤖 답변: ${(info.reply || "").trim() || "(무응답)"}`
-    : `🎤 들음 → ❌ ${info.note || "무시됨"}`;
+    ? `${who}🎤 들음 → 🗣️ "${info.transcript}"\n🤖 답변: ${(info.reply || "").trim() || "(무응답)"}`
+    : `${who}🎤 들음 → ❌ ${info.note || "무시됨"}`;
 
   const lines: string[] = [];
   const listen = durSec(info.listenStartMs, info.listenEndMs);
@@ -120,7 +124,7 @@ async function joinAndListen(client: AnyClient, channelId: string): Promise<void
   // joinVoiceChannel (it exposes id, guild.id and guild.voiceAdapterCreator).
   const session = await joinChannel(channel as unknown as VoiceBasedChannel);
   session.onTurn = (info) => {
-    console.log(`🗣️  ${info.transcript || "(" + (info.note || "empty") + ")"}\n🤖 ${info.reply}`);
+    console.log(`👤 ${info.user || "?"} 🗣️  ${info.transcript || "(" + (info.note || "empty") + ")"}\n🤖 ${info.reply}`);
     // Mirror every heard utterance (and the reply / drop reason) to a text
     // channel so you can see what the bot understood even when it doesn't answer.
     void postTranscript(client, info);

bot/src/voice.ts

@@ -66,6 +66,13 @@ export class VoiceSession {
   private connection: VoiceConnection;
   private player: AudioPlayer;
   private listening = new Set<string>();
+  /** Set once the session is torn down (user left / leave command). In-flight
+   *  captures check this so we don't run STT/reply or post a transcript for
+   *  audio that arrived after the user already left the channel. */
+  private destroyed = false;
+  /** Opus subscriptions currently capturing, so leave() can end them
+   *  immediately instead of waiting out the silence timeout. */
+  private activeStreams = new Set<{ destroy: () => void }>();
   /** Pending reply clips. Played one at a time so concurrent speakers don't
    *  cut each other's replies off. */
   private playQueue: Buffer[] = [];
@@ -158,11 +165,14 @@ export class VoiceSession {
   }
 
   private async captureUtterance(userId: string): Promise<void> {
+    // Don't start a new capture once we're tearing down (user left).
+    if (this.destroyed) return;
     // "듣기 시작": the moment we begin capturing this speaker's utterance.
     const listenStartMs = Date.now();
     const opusStream = this.connection.receiver.subscribe(userId, {
       end: { behavior: EndBehaviorType.AfterSilence, duration: config.silenceMs },
     });
+    this.activeStreams.add(opusStream);
     const decoder = new prism.opus.Decoder({
       frameSize: 960,
       channels: DISCORD_CHANNELS,
@@ -173,6 +183,11 @@ export class VoiceSession {
     pcmStream.on("data", (c: Buffer) => chunks.push(c));
 
     await new Promise<void>((resolve) => pcmStream.once("end", () => resolve()));
+    this.activeStreams.delete(opusStream);
+    // If the user left while we were capturing, drop this utterance entirely —
+    // don't run STT/reply or report a (usually empty/VAD-blocked) turn for
+    // audio that trailed in after they left.
+    if (this.destroyed) return;
     // "듣기 종료": end of speech (silence detected). Anything after this is
     // STT + reply + TTS on the brain side.
     const listenEndMs = Date.now();
@@ -264,6 +279,18 @@ export class VoiceSession {
   }
 
   destroy() {
+    this.destroyed = true;
+    // End any in-flight captures now so their pcmStream resolves immediately
+    // and the post-capture `destroyed` check drops them (no trailing
+    // post-leave VAD turns).
+    for (const s of this.activeStreams) {
+      try {
+        s.destroy();
+      } catch {
+        /* already ended */
+      }
+    }
+    this.activeStreams.clear();
     try {
       this.connection.destroy();
     } catch {