fix(marmot-interop): publish kind:0 for B and C before sanity probes

Several public relays (damus.io in particular) silently drop kind:1059 /
10050 / 30443 from accounts they've never seen before — the sanity
check in the interactive harness reports exactly this failure mode
when the three-relay default set is in use, because wn's identities are
brand-new and have nothing on file.

Before the kind:30443 + 10050/1059/445 probes, publish a kind:0
profile event for each wn identity via `wn profile update --name
--about`. That marks both accounts as "known" on the relay and lets
the subsequent gift-wrap and KeyPackage publishes land. Runs inside
configure_relays (after relays are added, before the first sanity
probe) so the sequencing is: add relay -> advertise profile -> publish
KPs -> start exchanging welcomes.

Does not help when a relay outright refuses the kind (some relays
whitelist only kind:1 / 3 / 7); those still need --local-relays.

tools/marmot-interop/marmot-interop.sh

@@ -281,6 +281,36 @@ configure_relays() {
     add_relay wn_c "$r"
   done
 
+  # Push a kind:0 profile for each wn identity BEFORE the kind:30443 /
+  # 10050 / 1059 probes. Several public relays (damus.io in particular)
+  # silently drop non-profile kinds from accounts they've never seen
+  # before, so a fresh wn identity created inside the harness never gets
+  # its gift wraps or inbox lists stored. Publishing kind:0 first
+  # registers the account in the relay's "known users" set, which lets
+  # every later publish go through.
+  publish_profile() {
+    local who="$1" wnfn
+    if [[ "$who" == "B" ]]; then wnfn=wn_b; else wnfn=wn_c; fi
+    local name="marmot-interop $who"
+    local about="Scripted wn identity for Amethyst<->whitenoise-rs interop harness"
+    local out
+    if out=$("$wnfn" profile update --name "$name" --about "$about" 2>&1); then
+      info "$who kind:0 published (name=\"$name\")"
+      printf '%s profile update: %s\n' "$who" "$out" >>"$LOG_FILE"
+    else
+      warn "$who profile update failed: $out"
+      printf '%s profile update: %s\n' "$who" "$out" >>"$LOG_FILE"
+    fi
+  }
+  step "publishing kind:0 profiles so relays treat B and C as 'known' accounts"
+  publish_profile B
+  publish_profile C
+  # Give the relay a beat to persist + ack the kind:0 before the next
+  # publish (some relays gate subsequent writes on the profile being
+  # indexed, and without this pause the first `keys publish` that
+  # follows sometimes races ahead of the kind:0 commit).
+  sleep 2
+
   step "B relay list after configure"
   local relay_list
   relay_list=$(wn_b --json relays list 2>/dev/null || true)