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

compliance-agent/Cargo.toml

@@ -37,5 +37,8 @@ urlencoding = "2"
 futures-util = "0.3"
 jsonwebtoken = "9"
 zip = { workspace = true }
+aes-gcm = { workspace = true }
 tokio-tungstenite = { version = "0.26", features = ["rustls-tls-webpki-roots"] }
 futures-core = "0.3"
+dashmap = { workspace = true }
+tokio-stream = { workspace = true }