fix(tests): fix flaky getSnapshotsSince test #4809

Job	Run time
sdk-compat / Node.js 20.20 (ubuntu-latest)	2m 0s
units / packages / 🧪 Unit Tests: Packages (1, 1)	8m 12s
sdk-compat / Bun Runtime	2m 5s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	3m 27s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	3m 52s
sdk-compat / Cloudflare Workers	2m 15s
typecheck / typecheck	6m 21s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	5m 47s
units / internal / 🧪 Unit Tests: Internal (1, 8)	6m 23s
units / internal / 🧪 Unit Tests: Internal (2, 8)	10m 2s
units / internal / 🧪 Unit Tests: Internal (4, 8)	5m 22s
units / internal / 🧪 Unit Tests: Internal (8, 8)	3m 21s
units / internal / 🧪 Unit Tests: Internal (5, 8)	4m 6s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	1m 48s
sdk-compat / Deno Runtime	1m 46s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 40s
units / internal / 🧪 Unit Tests: Internal (6, 8)	5m 6s
sdk-compat / Node.js 22.12 (ubuntu-latest)	1m 58s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	3m 51s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 9s
units / internal / 🧪 Unit Tests: Internal (3, 8)	6m 30s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	5m 50s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	3m 3s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	8m 7s
units / internal / 🧪 Unit Tests: Internal (7, 8)	5m 30s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	1m 43s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	5m 46s
units / webapp / 📊 Merge Reports	57s
units / packages / 📊 Merge Reports	20s
units / internal / 📊 Merge Reports	23s
	2h 2m 40s

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