Fixes T12811. The issue here appears to be that both the "alice committed rXYZabc" and "Herald added projects..." actions have the same (default) strength and end up applying in arbitrary order, and probably got shuffled around as this transitioned to Modular transactions.

Give "alice committed rXYZabc" an explicitly higher action strength.

• Wrote an "Always, add project X" Herald rule for commits.
• Ran bin/repository reparse --herald ....
• Saw an "alice committed rXYZabc" story instead of a "Herald added projects: X" story.