Implement LLM-WP-0007: Kimi K3 default and EUR spend reporting

Add moonshotai/kimi-k3 as OpenRouter basemodel default after live smoke,
USD→EUR cost conversion, append-only usage ledger, and CLI run/cost/spend
week commands with token and euro reporting.

llm_connect/server.py

@@ -45,6 +45,7 @@ from llm_connect.exceptions import (
 )
 from llm_connect.models import LLMResponse, RunConfig
 from llm_connect.profiles import ProfiledLLMAdapter, default_runtime_profiles
+from llm_connect.usage import maybe_record_usage, suppress_auto_usage_record
 
 
 class _Handler(BaseHTTPRequestHandler):
@@ -101,8 +102,19 @@ class _Handler(BaseHTTPRequestHandler):
                         "Adapter rejected RunConfig",
                         context={"model_name": config.model_name},
                     )
-                response = adapter.execute_prompt(prompt, config)
+                with suppress_auto_usage_record():
+                    response = adapter.execute_prompt(prompt, config)
             latency = time.time() - start
+            provider = (
+                (response.metadata or {}).get("provider")
+                or getattr(adapter, "provider_id", None)
+                or type(adapter).__name__
+            )
+            maybe_record_usage(
+                response,
+                provider=str(provider),
+                source="server",
+            )
             body = response.to_dict()
             debug = diagnostics.to_dict() if diagnostics is not None else None
             if debug_enabled and debug is not None: