Add support for insecure TLS connections

[currantw]

Summary

Fixes #163: Adds support for insecure TLS mode.

Changes

• Added ConnectionConfiguration.UseInsecureTls property: Boolean property with validation.
• Added ConnectionConfiguration.WithInsecureTls() method: builder for enabling/disabling insecure mode.
• Updated ConnectionConfiguration.UseTls property: Now handles both SecureTls and InsecureTls.
• Added new unit and integration tests. See the Testing for details.

var config = new StandaloneClientConfigurationBuilder();

// Enable insecure TLS using fluent methods:
config.WithTls().WithInsecureTls();

// Enable insecure TLS using properties:
builder.UseTls = true;
builder.UseInsecureTls = true;

Testing

• Add 5 new unit tests that cover default behaviour, enable/disable, validation, and property interactions.
• Added 2 new integration tests to verify insecure TLS for cluster and standalone.

✅ All tests pass on .NET 8.0.

See Also

⚪ None

[Copilot]

Pull request overview

This PR adds support for insecure TLS connections by introducing a new UseInsecureTls configuration option that allows bypassing certificate verification when connecting to Valkey servers via TLS. This is intended for development and testing environments where self-signed certificates are used.

Key changes:

• Added UseInsecureTls property and WithInsecureTls() fluent method for configuring insecure TLS mode
• Converted TlsMode from nullable to non-nullable enum with explicit NoTls, InsecureTls, and SecureTls values
• Updated UseTls property logic to handle both secure and insecure TLS modes

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
sources/Valkey.Glide/ConnectionConfiguration.cs	Adds UseInsecureTls property and WithInsecureTls() method; updates UseTls property to handle multiple TLS modes
sources/Valkey.Glide/Internals/FFI.structs.cs	Adds InsecureTls enum value and changes TlsMode from nullable to non-nullable type
tests/Valkey.Glide.UnitTests/ConnectionConfigurationTests.cs	Adds 5 unit tests for insecure TLS functionality and updates existing TLS tests to verify explicit enum values
tests/Valkey.Glide.UnitTests/ConnectionMultiplexerReadFromMappingTests.cs	Updates assertion to verify exact SecureTls mode instead of just non-null
tests/Valkey.Glide.IntegrationTests/TlsTests.cs	Adds integration tests for cluster and standalone insecure TLS connections

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[xShinnRyuu]

LGTM

[xShinnRyuu]

LGTM again