Add OmniCompass evaluation results

Add the OmniCompass benchmark authors' published results for TimeLens-8B on omnicompass_vl. Each value is Overall Cross-Specification Consistency Score on a 0-100 scale; higher is better.

Source: https://omnicompass.netlify.app/#leaderboard
Benchmark: https://huggingface.co/datasets/VCLab-PolyU/OmniCompass

The YAML preserves the published one-decimal scores and records frame counts and source attribution. It adds evaluation metadata only and makes no HF verified claim.

.eval_results/omnicompass.yaml

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+- dataset:
+    id: VCLab-PolyU/OmniCompass
+    task_id: omnicompass_vl
+  value: 23.6
+  source:
+    url: https://omnicompass.netlify.app/#leaderboard
+    name: OmniCompass official results
+    user: VCLab-PolyU
+  notes: OmniCompass-VL; Overall CS on a 0-100 scale, higher is better. 32 video frames;
+    paired Text and Text+Image; TG, SG and QA. Imported from the benchmark authors'
+    published results, rounded to one decimal. Evaluation settings and model-specific
+    limits follow the cited source. This submission does not claim HF verified status.