Do not default construct SourceLink

The KF previously default-constructed source link objects when inserting into the measurement map. Now it emplaces, therefore not placing the implicit requirement on source links to be default constructible (that's not explicitly required in the concept).

changed milestone to %0.10.04

added Bug label

added 6 commits

• 014b4e4c...5848dca3 - 5 commits from branch master
• 24f65ffa - Do not default construct SourceLink

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approved this merge request

added 3 commits

• 24f65ffa...64ea3ac5 - 2 commits from branch master
• cd844201 - Do not default construct SourceLink

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enabled an automatic merge when the pipeline for cd844201 succeeds

added Approved label

merged

mentioned in commit 208abc3a

mentioned in merge request atlas/atlasexternals!547 (merged)

mentioned in merge request atlas/athena!26660 (merged)