MAESTRO: Merge PRs #920 and #699 - Add project exclusion and folder CLAUDE.md exclusion settings

Cherry-picked both PRs to main (both had merge conflicts with current main).

PR #920 (@Spunky84): CLAUDE_MEM_EXCLUDED_PROJECTS setting with glob patterns
to exclude entire projects from memory tracking (privacy/confidentiality).
Early-exit in session-init and observation handlers. 11 unit tests.

PR #699 (@leepokai): CLAUDE_MEM_FOLDER_MD_EXCLUDE setting with JSON array
of paths to exclude from CLAUDE.md file generation (fixes SwiftUI/Xcode
build conflicts and drizzle kit migration failures). Closes #620.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/ui/viewer/constants/settings.ts

@@ -36,4 +36,8 @@ export const DEFAULT_SETTINGS = {
   // Feature Toggles
   CLAUDE_MEM_CONTEXT_SHOW_LAST_SUMMARY: 'true',
   CLAUDE_MEM_CONTEXT_SHOW_LAST_MESSAGE: 'false',
+
+  // Exclusion Settings
+  CLAUDE_MEM_EXCLUDED_PROJECTS: '',
+  CLAUDE_MEM_FOLDER_MD_EXCLUDE: '[]',
 } as const;