fix(config): validate providers config entries — reject non-URL base, accept camelCase aliases (#9332)

Cherry-picked from PR #9359 by @luyao618.

- Accept camelCase aliases (apiKey, baseUrl, apiMode, keyEnv, defaultModel,
  contextLength, rateLimitDelay) with auto-mapping to snake_case + warning
- Validate URL field values with urlparse (scheme + netloc check) — reject
  non-URL strings like 'openai-reverse-proxy' that were silently accepted
- Warn on unknown keys in provider config entries
- Re-order URL field priority: base_url > url > api (was api > url > base_url)
- 12 new tests covering all scenarios

Closes #9332

hermes_cli/config.py

@@ -13,6 +13,7 @@ This module provides:
 """
 
 import copy
+import logging
 import os
 import platform
 import re
@@ -24,6 +25,7 @@ from dataclasses import dataclass
 from pathlib import Path
 from typing import Dict, Any, Optional, List, Tuple
 
+logger = logging.getLogger(__name__)
 
 _IS_WINDOWS = platform.system() == "Windows"
 _ENV_VAR_NAME_RE = re.compile(r"^[A-Za-z_][A-Za-z0-9_]*$")
@@ -1850,12 +1852,53 @@ def _normalize_custom_provider_entry(
     if not isinstance(entry, dict):
         return None
 
+    # Accept camelCase aliases commonly used in hand-written configs.
+    _CAMEL_ALIASES: Dict[str, str] = {
+        "apiKey": "api_key",
+        "baseUrl": "base_url",
+        "apiMode": "api_mode",
+        "keyEnv": "key_env",
+        "defaultModel": "default_model",
+        "contextLength": "context_length",
+        "rateLimitDelay": "rate_limit_delay",
+    }
+    _KNOWN_KEYS = {
+        "name", "api", "url", "base_url", "api_key", "key_env",
+        "api_mode", "transport", "model", "default_model", "models",
+        "context_length", "rate_limit_delay",
+    }
+    for camel, snake in _CAMEL_ALIASES.items():
+        if camel in entry and snake not in entry:
+            logger.warning(
+                "providers.%s: camelCase key '%s' auto-mapped to '%s' "
+                "(use snake_case to avoid this warning)",
+                provider_key or "?", camel, snake,
+            )
+            entry[snake] = entry[camel]
+    unknown = set(entry.keys()) - _KNOWN_KEYS - set(_CAMEL_ALIASES.keys())
+    if unknown:
+        logger.warning(
+            "providers.%s: unknown config keys ignored: %s",
+            provider_key or "?", ", ".join(sorted(unknown)),
+        )
+
+    from urllib.parse import urlparse
+
     base_url = ""
-    for url_key in ("api", "url", "base_url"):
+    for url_key in ("base_url", "url", "api"):
         raw_url = entry.get(url_key)
         if isinstance(raw_url, str) and raw_url.strip():
-            base_url = raw_url.strip()
-            break
+            candidate = raw_url.strip()
+            parsed = urlparse(candidate)
+            if parsed.scheme and parsed.netloc:
+                base_url = candidate
+                break
+            else:
+                logger.warning(
+                    "providers.%s: '%s' value '%s' is not a valid URL "
+                    "(no scheme or host) — skipped",
+                    provider_key or "?", url_key, candidate,
+                )
     if not base_url:
         return None