Data explorer: Make date summary stats optional #900

Job	Run time
Lint	1m 46s
Check Python types	3m 42s
Test Positron IPyKernel (ubuntu-latest, 3.8)	2m 52s
Test Minimum Positron IPyKernel Dependencies (ubuntu-latest, 3.8)	3m 26s
Test Positron IPyKernel (macos-13, 3.9)	3m 49s
Python Tests (ubuntu-latest, 3.8)	2m 13s
Test Positron IPyKernel (windows-latest, 3.10)	10m 41s
Python Tests (ubuntu-latest, 3.12)	2m 16s
Test TypeScript (ubuntu-latest, 3.x, ts-unit)	4m 13s
Test Positron IPyKernel (ubuntu-latest, 3.11)	2m 51s
Test TypeScript (ubuntu-latest, 3.x, functional)	5m 29s
Test Positron IPyKernel (ubuntu-latest, 3.12)	1m 33s
Test TypeScript (macos-12, 3.x, ts-unit)	7m 56s
Test TypeScript (macos-12, 3.x, venv)	6m 54s
Test TypeScript (macos-12, 3.x, single-workspace)	10m 13s
Test TypeScript (macos-12, 3.x, debugger)	7m 21s
Test TypeScript (macos-12, 3.x, functional)	8m 49s
Test TypeScript (macos-12, 3.x, smoke)	8m 19s
Test TypeScript (windows-latest, 3.x, ts-unit)	13m 4s
Test TypeScript (windows-latest, 3.x, functional)	9m 21s
	1h 56m 48s

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