chore: update custom_app schema

Author: lzf575

.gitignore

@@ -56,6 +56,7 @@ target/
 /agent/src/ebpf/samples/rust/socket-tracer/src/ebpf.rs
 /agent/src/ebpf/.flamegraph.pl
 /agent/src/ebpf/kernel/*.tmp
+/.claude
 
 
 

server/agent_config/custom_app.example.yaml

@@ -148,6 +148,8 @@ biz_field:
           value: xyz
         - key: ignore_case
           value: true
+        - key: trim
+          value: '"[]'
       - type: parse_dict_value
         settings:
         - key: keyword

server/agent_config/custom_app.schema.yaml

@@ -934,6 +934,7 @@ $defs:
         - key_value_separator: Separator between key and value, default is "=".
         - keyword: Field(s) to search for.
         - ignore_case: Whether to ignore case.
+        - trim: Trims the extracted result by removing matching leading and trailing characters. This works as a character set rather than a whole substring. For example, when `trim` is `abc`, `acdbddb` becomes `dbdd`.
       - `Parse Dict Value` (`parse_dict_value`): Parses the value as a dictionary, and outputs the value corresponding to the specified key. Supported configuration:
         - keyword: Field to search for.
         - type: Can only be string.
@@ -978,6 +979,7 @@ $defs:
         - key_value_separator：键值分隔符，默认为"="。
         - keyword：要查找的字段。
         - ignore_case：是否忽略大小写。
+        - trim：对提取结果做首尾裁剪，去掉两端与该配置中任一字符相同的字符。这里按“字符集合”生效，而不是按整段子串生效。例如 `trim` 为 `abc` 时，`acdbddb` 会变成 `dbdd`。
       - `字典提取` (`parse_dict_value`)：将值作为字典解析，并输出指定 key 对应的 value。支持配置为：
         - keyword：要查找的字段。
         - type：类型，只能为 string。