feat(security): decouple transport tls from auth

[yordis]

• Some deployments need plaintext transport behind an existing trusted network boundary without losing authentication and authorization checks.
• Operators need --insecure to keep its existing all-security-off meaning while having a narrower transport-only switch.
• Runtime surfaces should report the selected transport security state without suggesting plaintext transport is fully secure.

[cursor]

PR Summary

High Risk
Changes how transport security and auth interact at startup and on HTTP/TCP paths; misconfiguration could expose plaintext traffic or weaken expectations around --insecure.

Overview
Adds --disable-tls so operators can run plaintext HTTP/TCP while authentication and authorization stay on; --insecure still turns off auth, authorization, and TLS together.

ApplicationOptions gains DisableTls plus AuthDisabled() (Insecure only) and TlsDisabled() (Insecure or DisableTls). Startup and ClusterVNode wire TLS (certificates, secure endpoints, HTTPS, HTTP scheme) through TlsDisabled(), and passthrough vs real auth providers through AuthDisabled(). Trusted HTTP auth and Unix socket auth now require auth to remain enabled even when TLS is off; node certificate HTTP auth stays tied to TLS.

Program logs a dedicated TLS-disabled warning. The admin configuration browser shows "TLS disabled" with a warn tone when appropriate. Telemetry includes disableTls. Tests cover the new flag, insecure semantics, and a node that starts without certs with TLS off and internal auth still active.

^{Reviewed by Cursor Bugbot for commit 5dcb4f1. Bugbot is set up for automated code reviews on this repo. Configure here.}

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: de97dbeb-19b7-44f9-adcc-fd8f9328b3aa

📥 Commits

Reviewing files that changed from the base of the PR and between 1c446bf and 5dcb4f1.

📒 Files selected for processing (12)

• src/EventStore.ClusterNode/AuthorizationPolicyRegistryFactory.cs
• src/EventStore.ClusterNode/ClusterVNodeHostedService.cs
• src/EventStore.ClusterNode/Components/Services/ConfigurationBrowserService.cs
• src/EventStore.ClusterNode/Program.cs
• src/EventStore.Core.XUnit.Tests/Configuration/ClusterNodeOptionsTests/when_building/with_default_settings.cs
• src/EventStore.Core.XUnit.Tests/Configuration/ClusterNodeOptionsTests/when_building/with_secure_tcp.cs
• src/EventStore.Core.XUnit.Tests/Configuration/ClusterVNodeOptionsTests.cs
• src/EventStore.Core/Certificates/OptionsCertificateProvider.cs
• src/EventStore.Core/ClusterVNode.cs
• src/EventStore.Core/Configuration/ClusterVNodeOptions.cs
• src/EventStore.Core/Configuration/ClusterVNodeOptionsValidator.cs
• src/EventStore.Core/Telemetry/TelemetryService.cs

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch yordis/feat-disable-tls-auth-split

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