* Refactor: improve query scope composition with merge syntax
Replace manual WHERE clause concatenation with Rails' merge method
for more elegant and maintainable scope composition across Card,
Comment, and Filter models. This approach better follows Rails
conventions and improves code readability.
* Extend scope composition improvements to Card::Closeable
Apply the same nested hash syntax pattern to closures table references
in order and where clauses.
* Remove unnecessary outer braces from where clause
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Co-authored-by: Jeremy Daer <jeremy@37signals.com>
Ítalo Matos