feat(fabric): dm channels deliver any non-self message (no wakeup gate)

inbound: FabricMessage gains xType; the wakeup gate is bypassed when
xType==='dm' (self messages are already filtered upstream), so a 1:1
dm always reaches the model regardless of wakeup metadata.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/inbound.ts

@@ -44,6 +44,9 @@ type FabricMessage = {
   channelId?: string;
   attachments?: FabricAttachment[];
   wakeup?: boolean;
+  // x-type of the channel (sent on message.created). 'dm' bypasses the
+  // wakeup gate: any message that isn't the agent's own is delivered.
+  xType?: string;
 };
 
 export class FabricInbound {
@@ -252,7 +255,11 @@ export class FabricInbound {
       // the woken speaker emits a normal message or /no-reply). We still
       // record the message into the agent's session so it has the full
       // channel conversation as context whenever it IS later woken.
-      if (m.wakeup !== true) {
+      //
+      // Exception: dm channels are 1:1 — there is no turn/wakeup gating;
+      // any message that isn't the agent's own (already filtered above) is
+      // always delivered to the model.
+      if (m.xType !== 'dm' && m.wakeup !== true) {
         const ctxPayload = core.channel.reply.finalizeInboundContext(baseCtx);
         await core.channel.session.recordInboundSession({
           storePath,