feat: pentest onboarding — streaming, browser automation, reports, user cleanup (#16)

Complete pentest feature overhaul: SSE streaming, session-persistent browser tool (CDP), AES-256 credential encryption, auto-screenshots in reports, code-level remediation correlation, SAST triage chunking, context window optimization, test user cleanup (Keycloak/Auth0/Okta), wizard dropdowns, attack chain improvements, architecture docs with Mermaid diagrams.

Co-authored-by: Sharang Parnerkar <parnerkarsharang@gmail.com>
Reviewed-on: #16

docs/.vitepress/config.mts

@@ -1,6 +1,7 @@
 import { defineConfig } from 'vitepress'
+import { withMermaid } from 'vitepress-plugin-mermaid'
 
-export default defineConfig({
+export default withMermaid(defineConfig({
   title: 'Certifai',
   description: 'AI-powered security compliance scanning platform',
   ignoreDeadLinks: [
@@ -31,6 +32,7 @@ export default defineConfig({
           { text: 'Dashboard Overview', link: '/features/overview' },
           { text: 'DAST Scanning', link: '/features/dast' },
           { text: 'AI Pentest', link: '/features/pentest' },
+          { text: 'Pentest Architecture', link: '/features/pentest-architecture' },
           { text: 'AI Chat', link: '/features/ai-chat' },
           { text: 'Code Knowledge Graph', link: '/features/graph' },
           { text: 'MCP Integration', link: '/features/mcp-server' },
@@ -51,4 +53,5 @@ export default defineConfig({
       message: 'Certifai Documentation',
     },
   },
-})
+  mermaid: {},
+}))