[management, proxy] Management-owned LLM pricing: file-backed defaults + (#6965)

combined/config.yaml.example

@@ -134,3 +134,16 @@ server:
   #   trustedPeers: []                 # CIDRs of trusted peer networks (e.g. ["100.64.0.0/10"])
   #   accessLogRetentionDays: 7        # Days to retain HTTP access logs. 0 (or unset) defaults to 7. Negative values disable cleanup (logs kept indefinitely).
   #   accessLogCleanupIntervalHours: 24 # How often (in hours) to run the access-log cleanup job. 0 (or unset) is treated as "not set" and defaults to 24 hours; cleanup remains enabled. To disable cleanup, set accessLogRetentionDays to a negative value.
+
+  # Agent network (LLM gateway) settings (optional)
+  # agentNetwork:
+  #   # Path to the YAML file holding the default LLM pricing table. A relative
+  #   # path is resolved against dataDir, so a bare filename like "pricing.yaml"
+  #   # lands in the data directory. When empty, {dataDir}/defaults_llm_pricing.yaml
+  #   # is probed; if no file is present the compiled-in defaults are used.
+  #   # Schema: surface ("openai"/"anthropic"/"bedrock") -> model -> rates in USD
+  #   # per 1k tokens (input_per_1k, output_per_1k, and the optional
+  #   # cached_input_per_1k / cache_read_per_1k / cache_creation_per_1k). The file
+  #   # is re-read periodically (mtime poll). An explicitly configured path that
+  #   # fails to load fails startup; runtime reload errors keep the previous table.
+  #   pricingDefaultsFile: "pricing.yaml"