fix(admin-v2): Expand .dockerignore to exclude stale directories

Prevents bloated Docker build context from untracked directories
that appear inside admin-v2 on the Mac Mini.

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

admin-v2/.dockerignore

@@ -6,3 +6,39 @@ README.md
 *.log
 .env.local
 .env.*.local
+
+# Exclude stale root-level dirs that may appear inside admin-v2
+BreakpilotDrive
+backend
+docs
+billing-service
+consent-service
+consent-sdk
+ai-compliance-sdk
+admin-v2
+edu-search-service
+school-service
+voice-service
+geo-service
+klausur-service
+studio-v2
+website
+scripts
+agent-core
+pca-platform
+breakpilot-drive
+breakpilot-compliance-sdk
+dsms-gateway
+dsms-node
+h5p-service
+ai-content-generator
+policy_vault_*
+docker
+.docker
+vault
+librechat
+nginx
+e2e
+vitest.config.ts
+vitest.setup.ts
+playwright.config.ts