feat: implement real-time event handling and SSE support; add event publishing and subscription mechanisms

packages/common/src/realtime/keys.ts

@@ -0,0 +1,9 @@
+const normalizeProfileName = (profileName: string): string => {
+    const trimmed = profileName.trim();
+    return trimmed.length > 0 ? trimmed : 'unknown';
+};
+
+export const buildGameEventChannel = (profileName: string): string => {
+    const normalized = normalizeProfileName(profileName);
+    return `sammo:${normalized}:realtime:events`;
+};