test(relations): add explicit N+1 query-count assertions#61
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Adds tests that measure actual SQL query counts via DB::getQueryLog() to confirm eager loading (with()) issues a constant 2 queries regardless of parent row count — not one query per row — across hasMany, belongsTo, and the select()->with() chain. Includes a lazy- loading baseline test to make the N+1 contrast explicit rather than just asserting the eager case in isolation.
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Adds tests that measure actual SQL query counts via DB::getQueryLog() to confirm eager loading (with()) issues a constant 2 queries regardless of parent row count — not one query per row — across hasMany, belongsTo, and the select()->with() chain. Includes a lazy- loading baseline test to make the N+1 contrast explicit rather than just asserting the eager case in isolation.