v26.0.0

✨ Features and improvements

• Add a severity field to ValidationError. It is only set on non-fatal findings ("warning"); an absent severity still means "error", so existing consumers are unaffected (#1751) (by @HarelM)
• ⚠️ Allow debugging runtime warnings by attaching location of an warning and what will happen (#1740) (by @CommanderStorm)

🐞 Bug fixes

• Stop reporting pure legacy filters as mixed legacy/expression syntax. ["has", key] means the same thing in both syntaxes for example (#1751) (by @HarelM)
• Stop mixed-filter diagnostics from blanking the whole map (#1751) (#1752) (by @HarelM)