fix(ram_signature): use unquote_plus for query parameter decoding

Updated query parameter decoding to use unquote_plus instead of unquote for better handling of '+' characters in URLs. This change ensures that query parameters are decoded correctly, aligning with standard URL encoding practices.

修复(ram_signature)：使用 unquote_plus 解码查询参数
更新查询参数解码，改用 unquote_plus 代替 unquote，以更好地处理 URL 中的 '+' 字符。此更改确保查询参数正确解码，符合标准 URL 编码实践。

Change-Id: I6d8af91c3ac3512cf8b9a96dda4501a643e8fa66
Signed-off-by: OhYee <oyohyee@oyohyee.com>

Author: OhYee

agentrun/utils/ram_signature/signer.py

@@ -12,7 +12,7 @@
 import hashlib
 import hmac
 from typing import Optional
-from urllib.parse import quote, unquote, urlparse
+from urllib.parse import quote, unquote_plus, urlparse
 
 ALGORITHM = "AGENTRUN4-HMAC-SHA256"
 UNSIGNED_PAYLOAD = "UNSIGNED-PAYLOAD"
@@ -156,7 +156,7 @@ def get_agentrun_signed_headers(
         for pair in parsed.query.split("&"):
             if "=" in pair:
                 k, v = pair.split("=", 1)
-                query_params[unquote(k)] = unquote(v)
+                query_params[unquote_plus(k)] = unquote_plus(v)
 
     now = sign_time if sign_time is not None else datetime.now(timezone.utc)
     if now.tzinfo is None: