x-pack/filebeat/input/{cel,httpjson,http_endpoint,internal/httplog}: add debugging bread crumbs #38636
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Proposed commit message
When debugging issues in cel and httpjson the request trace log facility can be very useful, but the separated nature of the log can add friction since the only tie between the agent logs and the request trace logs is the time stamp. This adds an additional log message to the agent logs at DEBUG that marks the creation of a request transaction, noting the transaction ID into the agent logs.
A similar addition is made to http_endpoint.
Checklist
CHANGELOG.next.asciidoc
orCHANGELOG-developer.next.asciidoc
.Author's Checklist
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