find_disposable_misuse

Detect IDisposable / IAsyncDisposable instances at risk of leaking. Two patterns: local variables holding a disposable that aren't wrapped in using/await using/returned/assigned-to-field-or-out-parameter (warning), and bare-expression-statement discards of a disposable creator/factory (error). Returns a summary plus a per-violation list (severity error/warning, location, containing method, snippet). Skips test projects and generated code. Scope: methods only (not constructors/accessors/operators); ownership transfer via method/constructor argument is not detected. Static analysis only — no fix suggestions.