fix: limit history pagination to prevent 40s response times

The full pagination fix (ddad80a, e772001) caused history retrieval to
fetch up to 50 pages sequentially, taking 10-40 seconds instead of ~200ms.

Changes:
- Add maxPages parameter to getHistory() with default of 1 page
- Update poller to fetch 50 records (up from 10) in a single API call
- historyFetcher retains 100 records per page for UI display

This provides 5x more history for matching than before while keeping
the fast single-request performance.

Refs: develop-merge pagination performance issue

server/utils/poller.js

@@ -118,7 +118,7 @@ async function pollAllServices() {
         return queuesByType.sonarr || [];
       }) : timed('Sonarr Queue', async () => []),
       shouldPollSonarr ? timed('Sonarr History', async () => {
-        const historyByType = await arrRetrieverRegistry.getHistoryByType({ pageSize: 10 });
+        const historyByType = await arrRetrieverRegistry.getHistoryByType({ pageSize: 50 });
         return historyByType.sonarr || [];
       }) : timed('Sonarr History', async () => []),
       shouldPollRadarr ? timed('Radarr Queue', async () => {
@@ -126,7 +126,7 @@ async function pollAllServices() {
         return queuesByType.radarr || [];
       }) : timed('Radarr Queue', async () => []),
       shouldPollRadarr ? timed('Radarr History', async () => {
-        const historyByType = await arrRetrieverRegistry.getHistoryByType({ pageSize: 10 });
+        const historyByType = await arrRetrieverRegistry.getHistoryByType({ pageSize: 50 });
         return historyByType.radarr || [];
       }) : timed('Radarr History', async () => []),
       shouldPollRadarr ? timed('Radarr Tags', async () => {