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>

dist/fabric/src/inbound.js

@@ -201,7 +201,11 @@ 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,