fix: handle read-only Error.prepareStackTrace safely#2443
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Summary\n\n- Guard Error.prepareStackTrace assignment in lib/caller.js so environments with read-only accessors do not throw.\n- Restore Error.prepareStackTrace in a inally block and keep undefined fallback behavior when the legacy stack path cannot be used.\n- Add regression coverage in est/caller.test.js for the read-only prepareStackTrace case using proxyquire.\n\n## Validation\n\n-
px eslint lib/caller.js test/caller.test.js\n-
ode --test test/caller.test.js\n-
pm run test (note: fails on Windows locally because est/fixtures/ts/transpile.cjs invokes mv, unavailable on this environment)