docs: correct stale tooling and model references

Three migrations left their documentation behind:

wakeup.sh was replaced by the Makefile during the project structure
consolidation, but AGENTS.md and the e2e README still tell you to run it.
The log path moved to build/logs/server.log at the same time.

The local model moved to gemma4:e2b, but the e2e prerequisites and the
benchmark recommendation still name mistral-nemo.

The benchmark figures in CLAUDE.md predate the current model. Measured
2026-08-07: ~95 tok/s, full flow ~10-13s for simple turns, cold model load
~36s rather than ~8s. A turn costs three sequential Ollama calls and ~710
generated tokens regardless of how trivial the question is.

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

scripts/benchmark_steward.py

@@ -268,7 +268,7 @@ async def run_benchmarks(iterations: int = 10, verbose: bool = False):
             print(f"   Max: {overall_max:.3f}s (target: ≤5.0s)")
             print(f"   Avg: {overall_avg:.3f}s (target: ≤1.67s)")
             print(f"\n   Recommendations:")
-            print(f"   - Switch to a faster model (current: mistral-nemo)")
+            print(f"   - Switch to a faster model (current: gemma4:e2b)")
             print(f"   - Reduce system prompt complexity")
             print(f"   - Limit tool calls (currently limited to 3)")
             print(f"   - Consider caching household registry responses")