DPL Analysis: Fix DECLARE_SOA_CCDB_COLUMN_FULL's default construcor w…

[mhemmer-cern]

…hich was firing cppcoreguidelines-pro-type-member-init in O2Physics code when used.
The concrete error was: Constructor does not initialize these bases: Column

[mhemmer-cern]

This got triggered when the clang-tidy settings in O2Physics got changed: AliceO2Group/O2Physics#16868

[mhemmer-cern]

Hello @ktf @aalkin ,
Could you have a look at this please?

[ktf]

Isn't this an issue with the linter?

[mhemmer-cern]

I mean yeah sure it was clang-tidy that stated the issue. From my understanding this way Column is not left not initialize. I don't know if the default constructor is an actual problem that needs fixing, but if it silents the linter, shouldn't it be fine?

[alibuild]

Error while checking build/O2/fullCI_slc9 for fa1c4f9 at 2026-08-23 06:25:

## sw/BUILD/O2Physics-latest/log
c++: fatal error: Killed signal terminated program cc1plus
ninja: build stopped: subcommand failed.

Full log here.

[github-actions]

This PR did not have any update in the last 30 days. Is it still needed? Unless further action in will be closed in 5 days.

[vkucera]

@ktf @mhemmer-cern Clang-Tidy is right on this one, although the root cause is deeper, namely the default ColumnIterator constructor leaving its members uninitialised. Fixed in #15877