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/nickserv/src/noexpire.rs

@@ -0,0 +1,33 @@
+use fedserv_api::{Priv, Sender, ServiceCtx, Store};
+
+// NOEXPIRE <account> {ON|OFF}: pin an account so inactivity-expiry never drops
+// it (or lift the pin). Oper-only (Priv::Admin) — protecting a record from
+// expiry is a staff decision, not self-service.
+pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db: &mut dyn Store) {
+    if !from.privs.has(Priv::Admin) {
+        ctx.notice(me, from.uid, "Access denied — that command is for services operators.");
+        return;
+    }
+    let (Some(&target), Some(on)) = (args.get(1), args.get(2).and_then(|s| parse_toggle(s))) else {
+        ctx.notice(me, from.uid, "Syntax: NOEXPIRE <account> {ON|OFF}");
+        return;
+    };
+    let Some(account) = db.resolve_account(target).map(str::to_string) else {
+        ctx.notice(me, from.uid, format!("\x02{target}\x02 isn't registered."));
+        return;
+    };
+    match db.set_account_noexpire(&account, on) {
+        Ok(true) if on => ctx.notice(me, from.uid, format!("\x02{account}\x02 will no longer expire.")),
+        Ok(true) => ctx.notice(me, from.uid, format!("\x02{account}\x02 can expire from inactivity again.")),
+        Ok(false) => ctx.notice(me, from.uid, format!("\x02{account}\x02 was already set that way.")),
+        Err(_) => ctx.notice(me, from.uid, "Sorry, that didn't work. Please try again in a moment."),
+    }
+}
+
+fn parse_toggle(s: &str) -> Option<bool> {
+    match s.to_ascii_uppercase().as_str() {
+        "ON" | "TRUE" | "YES" => Some(true),
+        "OFF" | "FALSE" | "NO" => Some(false),
+        _ => None,
+    }
+}