Add SECURITY_TRIAGE.md for vulnerability assessment and remediation plan

- Document current state of vulnerabilities in Rust and frontend dependencies
- Outline active vulnerabilities and their remediation status
- Include notes on resolved issues and remaining bugs
- Define a remediation plan with prioritized actions

Cargo.toml

@@ -29,7 +29,7 @@ reqwest = { version = "0.12", features = ["json", "multipart"] }
 hmac = "0.12"
 sha2 = "0.10"
 hex = "0.4"
-openidconnect = { version = "3.5", features = ["reqwest"] }
+openidconnect = { version = "4", features = ["reqwest"] }
 anyhow = "1.0"
 utoipa = { version = "5", features = ["axum_extras", "chrono", "uuid"] }
 thiserror = "2.0"