lib/logstorage: add pipe json_array_concat

[cuongleqq]

Closes #712

This PR adds the json_array_concat pipe for joining JSON array items stored in a log field into a single string with a given delimiter.

Syntax: json_array_concat [delimiter] [from <src_field>] [as <result_field>]

• delimiter is optional, defaults to empty string (items concatenated without separator)
• from <src_field> is optional, defaults to _msg
• as <result_field> is optional, defaults to <src_field> (in-place)

[cubic-dev-ai]

1 issue found across 5 files

Prompt for AI agents (unresolved issues)

Check if these issues are valid — if so, understand the root cause of each and fix them. If appropriate, use sub-agents to investigate and fix each issue separately.


<file name="lib/logstorage/pipe_json_array_concat.go">

<violation number="1" location="lib/logstorage/pipe_json_array_concat.go:135">
P2: Leading whitespace causes valid JSON arrays to be rejected before parsing, so the pipe returns an empty string for inputs the JSON parser accepts.</violation>
</file>

_{Reply with feedback, questions, or to request a fix. Tag @cubic-dev-ai to re-run a review, or fix all with cubic.}