Add an Inspect target that sorts ReSharper and Roslyn findings into triage buckets

[ANcpLua]

Problem

Finding the risky items among hundreds of ReSharper and Roslyn findings is manual work today. Fallout has no ReSharper wrapper since the JetBrains tooling cleanup (97ea857), and one solution-wide -p:ErrorLog=... loses findings because every compiler call overwrites the same file.

Outcome

• ReSharper wrapper is back (ReSharperInspectCode, ReSharperCleanupCode), updated to the jb 2026.2 options. dupfinder stays out: JetBrains removed it. The tool path is RESHARPER_EXE, then jb on the PATH (the global .NET tool), then the JetBrains.ReSharper.GlobalTools package. New ToolPathResolver.TryGetPathExecutable returns null instead of failing.
• IInspect component (behind [Experimental("FALLOUT005")]). fallout Inspect:
  1. runs dotnet build --no-incremental, with one Roslyn SARIF error log per project and target framework (an imported targets file sets ErrorLog);
  2. runs jb inspectcode --severity=HINT --no-swea --no-build;
  3. merges both, drops suppressed results, obj/ and generated files, keeps one finding per rule, file and line;
  4. sorts findings into runtime-candidate, review, mechanical and unclassified with an overridable rule table (InspectRules), and flags test files;
  5. writes inspect.sarif, inspect.tsv and inspect.md to the reports directory and one count line per bucket to stderr.
     It only reports: a failing build or tool logs a warning.
• Shim generator skips [Experimental] types. They have no NUKE-era consumers, and a shim deriving from one fails the shim build.
• FALLOUT002 to FALLOUT004 are already used by other warnings, so the new ID is FALLOUT005. The registry now says so.

Acceptance criteria

• InspectReportSpecs (merge, dedupe, filters, buckets, test flag, TSV) and TransitionShimGeneratorSpecs pass.
• ./build.sh Compile passes.
• End to end on a real solution (qyl, 22 projects, 3.5 minutes): 853 findings, 33 runtime-candidate, 79 review, 741 mechanical, 0 unclassified. All 284 rule, file and line keys of a hand triage at the default inspectcode severity are in the report. The known bug (a switch expression that throws for unhandled enum values) lands in runtime-candidate.

Usage

#pragma warning disable FALLOUT005
class Build : FalloutBuild, IInspect { }

🤖 Generated with Claude Code

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[dennisdoomen]

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