feat: add TLS configuration support to Ruby SDK

[markphelps]

Summary

• Add comprehensive TLS configuration options to the Ruby client SDK, matching the functionality from Python and Java implementations
• Add TlsConfig class with Ruby-idiomatic patterns (keyword arguments, attr_reader, factory methods)
• Support CA certificates (file paths and raw data), client certificates for mutual TLS, and insecure mode for development
• Update integration test framework to enable HTTPS testing for Ruby SDK with TLS certificates
• Update Ruby tests to handle HTTPS URLs with TLS configuration automatically like Python/Java
• Add comprehensive README documentation with Ruby-specific TLS examples

Key Features

• Ruby-idiomatic design: Uses keyword arguments, attr_reader, and factory methods
• File validation: Automatically validates certificate file existence
• Convenience methods: TlsConfig.insecure, TlsConfig.with_ca_cert_file, TlsConfig.with_mutual_tls, etc.
• Data precedence: Raw certificate data takes precedence over file paths
• JSON serialization: Proper to_h method for FFI layer integration
• Test integration: Updates integration test framework to use HTTPS with TLS certificates

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.31%. Comparing base (f701007) to head (76221eb).
Report is 434 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1136      +/-   ##
==========================================
- Coverage   80.36%   75.31%   -5.05%     
==========================================
  Files           8        9       +1     
  Lines        4165     4477     +312     
==========================================
+ Hits         3347     3372      +25     
- Misses        818     1105     +287     

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[Copilot]

Pull Request Overview

Adds TLS configuration support to the Ruby SDK, aligning behavior with the Python and Java clients.

• Updates the integration test framework to run Ruby tests over HTTPS with CA fixtures
• Introduces TlsConfig for configuring CA certificates, mutual TLS, and insecure mode
• Extends Flipt::Client to accept and validate a tls_config option and updates README accordingly

Reviewed Changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/main.go	Enable HTTPS in Ruby containers; mount TLS fixtures and set CA env var
flipt-client-ruby/spec/client_spec.rb	Wraps client instantiation in conditional TLS setup
flipt-client-ruby/lib/flipt_client/models.rb	Adds TlsConfig class with factory methods, validation, and serialization
flipt-client-ruby/lib/flipt_client.rb	Adds :tls_config option, validation method, and YARD docs
flipt-client-ruby/README.md	Documents tls_config usage with examples and options

Comments suppressed due to low confidence (3)

flipt-client-ruby/lib/flipt_client.rb:75

• Consider only adding the :tls_config key to opts when non-nil to avoid serializing a null value in JSON. For example, merge tls_config: tls_hash into opts only if tls_hash is present.

      opts[:tls_config] = validate_tls_config(opts.fetch(:tls_config, nil))

flipt-client-ruby/spec/client_spec.rb:8

• [nitpick] The initial client instantiation is immediately overridden when you set up TLS. You can simplify by removing this first call and including tls_config in the single constructor invocation.

    auth_token = ENV.fetch('FLIPT_AUTH_TOKEN', 'secret')

flipt-client-ruby/lib/flipt_client/models.rb:45

• There are no unit tests for TlsConfig itself. Consider adding specs to verify to_h output, file validation errors, and data-vs-file precedence.

  class TlsConfig

[erka]

nice