Group the module crates under modules/

The service pseudo-clients and the ircd protocol link sat flat at the
repo root, mixed in with the daemon core and the SDK. Move them all
under modules/ so the tree separates concerns cleanly: the daemon in
src/, the SDK every module links against in api/, and the loadable
modules — the pseudo-clients plus the protocol link — in modules/.

Workspace members, the daemon's per-crate dependency paths, and each
module's api path are updated to match; the docs follow. No code change.

modules/statserv/src/channel.rs

@@ -0,0 +1,21 @@
+use fedserv_api::{NetView, Sender, ServiceCtx, Store};
+
+// <#channel>: the lines seen in a channel this session and its top talkers.
+// Founder-or-admin.
+pub fn handle(me: &str, from: &Sender, chan: &str, ctx: &mut ServiceCtx, net: &dyn NetView, db: &mut dyn Store) {
+    if !super::require_channel_admin(me, from, chan, ctx, db) {
+        return;
+    }
+    let Some((lines, top)) = net.channel_activity(chan) else {
+        ctx.notice(me, from.uid, format!("No activity recorded for \x02{chan}\x02 yet."));
+        return;
+    };
+    ctx.notice(me, from.uid, format!("\x02{chan}\x02 — \x02{lines}\x02 line(s) seen this session."));
+    if top.is_empty() {
+        return;
+    }
+    ctx.notice(me, from.uid, "Top talkers:");
+    for (i, (nick, count)) in top.iter().enumerate() {
+        ctx.notice(me, from.uid, format!("  {}. \x02{nick}\x02 — {count}", i + 1));
+    }
+}