[OPIK-8202] [BE] fix: harden ClickHouseAppender against dropped user logs - #8126

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danield/OPIK-8202-fix-flaky-log-polling-tests

GitHub Actions / Backend Tests - Integration Group 6 succeeded Sep 3, 2026 in 0s

All 402 tests pass in 3m 39s

402 tests ±0 402 ✅ ±0 3m 39s ⏱️ -32s
48 suites ±0 0 💤 ±0
48 files ±0 0 ❌ ±0

Results for commit a360c1d. ± Comparison against earlier commit 48d2f87.

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