Update inference-sim submodule to latest version

- Update to commit c7529ff (adds ServeGen workload generator PR10)
- Includes: startup policy logging, workload spec support, native ServeGen loading
- Also update routing_policy.yaml (user-modified weights: cache=0.1, load=0.9)

New features in inference-sim:
- ServeGen-informed workload generator (PR10)
- Multi-client workload specs with realistic distributions
- Gamma/Weibull arrivals, Pareto-LogNormal inputs
- Native ServeGen data loading from chunk files
- Trace v2 format replay

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: toslali-ibm

examples/blis_router/inference-sim

@@ -3,8 +3,8 @@ admission:
 
 routing:
   policy: weighted
-  cache_weight: 0.6
-  load_weight: 0.4
+  cache_weight: 0.1
+  load_weight: 0.9
 
 priority:
   policy: constant