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error.message : String(error);\n}\n\nasync function releaseExecutionLock(\n modelId: string,\n ownerId: string,\n): Promise {\n let lastError: unknown = null;\n for (let attempt = 1; attempt <= 3; attempt++) {\n try {\n const released = await releaseBenchmarkExecution(modelId, ownerId);\n if (!released) {\n throw new BenchmarkLockLostError(\n \"Benchmark execution lock was no longer owned at release.\",\n );\n }\n return;\n } catch (error) {\n lastError = error;\n if (error instanceof BenchmarkLockLostError) break;\n if (attempt < 3) {\n await new Promise((resolve) => setTimeout(resolve, attempt * 250));\n }\n }\n }\n throw lastError instanceof Error\n ? lastError\n : new Error(\"Failed to release benchmark execution lock.\");\n}\n\nexport async function withBenchmarkExecutionLease(\n modelId: string,\n operation: (ensureLease: EnsureBenchmarkLease) => Promise,\n): Promise {\n const ownerId = crypto.randomUUID();\n const staleBefore = new Date(\n Date.now() - EXECUTION_LOCK_TIMEOUT_MS,\n ).toISOString();\n const claimed = await claimBenchmarkExecution(\n modelId,\n ownerId,\n staleBefore,\n );\n\n if (!claimed) {\n const activeRunId = await findRecentRunningRun(modelId, staleBefore);\n console.log(\n \"Skipping benchmark because another execution owns the model lock.\" +\n (activeRunId ? 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