feat(telemetry): session journey view replaces raw events table

- sessions listed from client_events grouped by session id (7d window)
- timeline sheet merges page views, client events, errors, and server-fn
  activities joined by player within the session window
- vitals excluded from timelines; gap markers over 5 minutes

src/lib/pocketbase/services/telemetry.ts

@@ -125,6 +125,7 @@ export interface ClientErrorSearchParams {
   groupHash?: string;
   resolved?: boolean;
   player?: string;
+  sessionId?: string;
   from?: string;
   to?: string;
   sortBy?: string;
@@ -175,12 +176,13 @@ export function createTelemetryService(pb: PocketBase) {
     async searchClientErrors(
       params: ClientErrorSearchParams = {}
     ): Promise<TelemetryListResult<ClientErrorRecord>> {
-      const { page = 1, perPage = 100, groupHash, resolved, player, from, to, sortBy = "-created" } = params;
+      const { page = 1, perPage = 100, groupHash, resolved, player, sessionId, from, to, sortBy = "-created" } = params;
 
       const filters: string[] = [];
       if (groupHash) filters.push(pbFilter(pb, "group_hash = {:groupHash}", { groupHash }));
       if (resolved !== undefined) filters.push(pbFilter(pb, "resolved = {:resolved}", { resolved }));
       if (player) filters.push(pbFilter(pb, "player = {:player}", { player }));
+      if (sessionId) filters.push(pbFilter(pb, "session_id = {:sessionId}", { sessionId }));
       if (from) filters.push(pbFilter(pb, "created >= {:from}", { from }));
       if (to) filters.push(pbFilter(pb, "created < {:to}", { to }));