[mkarlesky]

Summary

Two delta-build gaps from the #1083 work could leave a stale runner after a change that doesn't touch the test file. Both are new in the 1.2.0 prerelease (1.1.x rebuilt every stage every run), so there is no Changelog entry.

• Runner (stages 12–13). The runner was keyed on the raw test file and runner configuration alone, but it is generated from stage 4's reconciled mock and include lists and from test case names in the preprocessed test file. Enabling a module in a header left the new mock out of the runner. Its Init/Verify/Destroy never ran, so a missing expected call went undetected, a false pass. The runner target now depends on its input file too, and carries its mock and include lists in its meta.
• Preprocessed test file (stage 11). Its full gcc -E expansion reads every header the test reaches, but only the test file, flags, defines and search paths were tracked. A test case guarded by a macro defined in a header never appeared after the header enabled it, so the test was silently never run. Stage 11 now registers the project files its expansion's line markers name, as stage 4's directives-only pass already does.

Refactor

• Stages 11–13 move out of TestBuildExecutor into TestFilePreprocessinator (stage 11) and TestRunnerGeneratinator (stages 12–13). Both are fully RuboCop compliant.
• Registering "the project files a preprocessor's output entered" is shared through TestPipelineHelpers#register_preprocessed_dependencies. Preprocessinator#directives_only_dependencies becomes preprocessed_dependencies, since it reads any -E output.
• The RuboCop backlog drops from 847 to 840, with neither new class in it.
• PIPELINE.md and the dependencies README are updated.

Tests

• Unit specs for both new classes, the helper, and the renames. The wiring spec covers the new objects.yml entries.
• Two system examples in conditional_mock_includes_spec.rb, both red on next_version and green here (GCC 14, Docker):
  • after only a header enables MODULE_2, the rebuilt runner includes mock_MyModulePart2;
  • after only a header enables FEATURE_X, the guarded test case runs (TESTED goes from 1 to 2).
• Unit (4677 examples) and integration (452) tiers pass. In Docker, delta_builds, plugin_delta_builds, preprocessing_parameterized_tests, test_source_file_directive and shuffle_tests pass, so unchanged builds still skip these stages.

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