[APPSEC-60626] Remove Faraday from Steep ignore list

[Strech]

What does this PR do?

Removes Faraday contrib from the ignore list and add additional vendor gem typing.

Motivation:

Better type checking for development.

Change log entry

No.

Additional Notes:

AI was used with provided source code of the gem and result was reviewed.

How to test the change?

CI

[github-actions]

Typing analysis

Ignored files

This PR clears 5 ignored files. It increases the percentage of typed files from 42.43% to 42.98% (+0.55%).

Ignored files (+0-5)

✅ Cleared:

lib/datadog/appsec/contrib/faraday/connection_patch.rb
lib/datadog/appsec/contrib/faraday/integration.rb
lib/datadog/appsec/contrib/faraday/patcher.rb
lib/datadog/appsec/contrib/faraday/rack_builder_patch.rb
lib/datadog/appsec/contrib/faraday/ssrf_detection_middleware.rb

Note: Ignored files are excluded from the next sections.

Untyped methods

This PR introduces 2 partially typed methods. It increases the percentage of typed methods from 60.13% to 60.38% (+0.25%).

Partially typed methods (+2-0)

❌ Introduced:

sig/datadog/appsec/contrib/faraday/connection_patch.rbs:6
└── def initialize: (*untyped) ?{ (::Faraday::Connection) -> void } -> void
sig/datadog/appsec/contrib/faraday/rack_builder_patch.rbs:6
└── def adapter: (*untyped) -> ::Faraday::RackBuilder::Handler?

If you believe a method or an attribute is rightfully untyped or partially typed, you can add # untyped:accept on the line before the definition to remove it from the stats.

[pr-commenter]

Benchmarks

Benchmark execution time: 2026-02-13 12:19:15

Comparing candidate commit 1bb5dff in PR branch appsec-60626-add-faraday-contrib-to-steep with baseline commit 4f22dac in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 44 metrics, 2 unstable metrics.

[datadog-official]

✅ Tests

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 95.11% (+0.00%)

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