Dudik/debugger/guardrails tests

[dudikeleti]

Motivation

Add focused system-test coverage for the debugger guardrails required for GA.

Changes

• Add Test_Debugger_Evaluation_Timeout: expensive when evaluation (ReDoS regex, large collection filter) must be aborted and surfaced as an evaluation-error snapshot (populated evaluationErrors[], no captured data), not a normal snapshot.
• Add Test_Debugger_Snapshot_Guardrails: completed snapshots are trimmed to ≤1 MB, and capture exceeding the time budget reports notCapturedReason=timeout.
• Extend test_default_max_length to assert notCapturedReason=stringLength, completing default capture-limit reason coverage.
• Extract shared captures_contain_data helper into debugger.utils (reused by the condition-error tests).
• All new guardrail rows are marked missing_feature across every tracer; enable per-language as support lands. The regex fixture only exercises backtracking engines (linear engines like Go stay disabled via manifests).

Workflow

1. ⚠️ Create your PR as draft ⚠️
2. Work on you PR until the CI passes
3. Mark it as ready for review
   • Test logic is modified? -> Get a review from RFC owner.
   • Framework is modified, or non obvious usage of it -> get a review from R&P team

🚀 Once your PR is reviewed and the CI green, you can merge it!

🛟 #apm-shared-testing 🛟

Reviewer checklist

• Anything but tests/ or manifests/ is modified ? I have the approval from R&P team
• A docker base image is modified?
  • the relevant build-XXX-image label is present
• A scenario is added, removed or renamed?
  • Get a review from R&P team

[github-actions]

CODEOWNERS have been resolved as:

tests/debugger/test_debugger_guardrails.py                              @DataDog/debugger @DataDog/system-tests-core
tests/debugger/utils/probes/probe_capture_timeout_reason.json           @DataDog/debugger @DataDog/system-tests-core
tests/debugger/utils/probes/probe_evaluation_timeout_collection_filter.json  @DataDog/debugger @DataDog/system-tests-core
tests/debugger/utils/probes/probe_evaluation_timeout_regex.json         @DataDog/debugger @DataDog/system-tests-core
tests/debugger/utils/probes/probe_snapshot_size_cap.json                @DataDog/debugger @DataDog/system-tests-core
manifests/dotnet.yml                                                    @DataDog/apm-dotnet @DataDog/asm-dotnet
manifests/golang.yml                                                    @DataDog/dd-trace-go-guild
manifests/java.yml                                                      @DataDog/asm-java @DataDog/apm-java
manifests/nodejs.yml                                                    @DataDog/dd-trace-js
manifests/php.yml                                                       @DataDog/apm-php @DataDog/asm-php
manifests/python.yml                                                    @DataDog/apm-python @DataDog/asm-python
manifests/ruby.yml                                                      @DataDog/ruby-guild @DataDog/asm-ruby
tests/debugger/test_debugger_condition_errors.py                        @DataDog/debugger @DataDog/system-tests-core
tests/debugger/test_debugger_probe_snapshot.py                          @DataDog/debugger @DataDog/system-tests-core
tests/debugger/utils.py                                                 @DataDog/debugger @DataDog/system-tests-core

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