feat(FN-5374): raise room transcript defaults and align compaction settings

Raised room transcript defaults (`messagesBefore` and `daysBefore`) in the core settings schema and updated project-level setting defaults, with corresponding documentation refresh in the settings reference. Added full test coverage for room compaction defaults, pinned room default settings in Setti

Fusion-Task-Id: FN-5374

packages/core/src/__tests__/settings-parity.test.ts

@@ -96,6 +96,18 @@ describe("settings key parity", () => {
     expect(isGlobalSettingsKey("chatAutoCleanupDays")).toBe(false);
   });
 
+  it("keeps room compaction defaults project-scoped with expanded retention", () => {
+    expect(DEFAULT_PROJECT_SETTINGS.chatRoomRecentVerbatimMessages).toBe(25);
+    expect(DEFAULT_PROJECT_SETTINGS.chatRoomCompactionFetchLimit).toBe(200);
+    expect(DEFAULT_PROJECT_SETTINGS.chatRoomSummaryMaxChars).toBe(3_000);
+    expect(isProjectSettingsKey("chatRoomRecentVerbatimMessages")).toBe(true);
+    expect(isProjectSettingsKey("chatRoomCompactionFetchLimit")).toBe(true);
+    expect(isProjectSettingsKey("chatRoomSummaryMaxChars")).toBe(true);
+    expect(isGlobalSettingsKey("chatRoomRecentVerbatimMessages")).toBe(false);
+    expect(isGlobalSettingsKey("chatRoomCompactionFetchLimit")).toBe(false);
+    expect(isGlobalSettingsKey("chatRoomSummaryMaxChars")).toBe(false);
+  });
+
   it("defaults mailAutoCleanupDays to off and keeps it project-scoped", () => {
     expect(DEFAULT_PROJECT_SETTINGS.mailAutoCleanupDays).toBe(0);
     expect(isProjectSettingsKey("mailAutoCleanupDays")).toBe(true);

packages/core/src/settings-schema.ts

@@ -389,9 +389,9 @@ export const DEFAULT_PROJECT_SETTINGS = {
   showQuickChatFAB: false,
   chatAutoCleanupDays: 0,
   mailAutoCleanupDays: 0,
-  chatRoomRecentVerbatimMessages: 12,
-  chatRoomCompactionFetchLimit: 80,
-  chatRoomSummaryMaxChars: 1_500,
+  chatRoomRecentVerbatimMessages: 25,
+  chatRoomCompactionFetchLimit: 200,
+  chatRoomSummaryMaxChars: 3_000,
   researchSettings: {
     enabled: true,
     searchProvider: undefined,