feat: enhance schema fetching and add edge case tests

- Updated schema fetching logic to handle cases where the "servers" key may be absent or empty.
- Improved credential redaction patterns for better security.
- Introduced a comprehensive suite of edge case tests covering various functions, including authentication parsing, identity handling, instruction processing, and variable parsing.
- Refactored planner tests to support asynchronous execution, ensuring robust testing of planning and re-planning functionalities.

Author: Av7danger

src/secnodeapi/memory/semantic/ingestion.py

@@ -16,8 +16,9 @@
     TargetProfile,
 )
 
-# Credential patterns to redact
+# Credential patterns to redact (order matters: more specific first)
 _REDACT_PATTERNS = [
+    (re.compile(r"(?i)authorization\s*:\s*Bearer\s+\S+", re.I), "Authorization: [REDACTED]"),
     (re.compile(r"(?i)authorization\s*:\s*[^\s]+", re.I), "Authorization: [REDACTED]"),
     (re.compile(r"(?i)x-api-key\s*:\s*[^\s]+", re.I), "X-API-Key: [REDACTED]"),
     (re.compile(r"(?i)password['\"]?\s*[:=]\s*['\"]?[^\s'\"]+", re.I), "password=[REDACTED]"),

src/secnodeapi/schema_fetcher.py

@@ -105,7 +105,8 @@ def analyze_api_structure(schema: Dict[str, Any], schema_target: Optional[str] =
                 request_body_schema={"present": has_body}
             ))
 
-    raw_base = schema.get("servers", [{"url": "/"}])[0].get("url", "/")
+    servers = schema.get("servers") or [{"url": "/"}]
+    raw_base = servers[0].get("url", "/") if servers else "/"
     base_url = _resolve_base_url(raw_base, schema_target)
 
     return SchemaStructure(