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Add BC performance knowledge from OptimAL learnings

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Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
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microsoft/knowledge/performance/avoid-get-inside-loop-on-large-table.md
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@ -15,7 +15,7 @@ A `Get` or `FindFirst` against another persistent table inside a loop can produc
## Best Practice
Use a query object to join the outer and inner tables when the relationship and filters can be expressed as one query. If keys repeat, a dictionary cache can reduce lookups to one per distinct key. `SetLoadFields` can reduce the columns transferred by unavoidable inner reads, but it does not eliminate the N+1 shape and must not be presented as doing so.
Use a query object to join the outer and inner tables when the relationship and filters can be expressed as one query. If complete lookup keys repeat and the result remains valid, a [scoped cache](cache-repeated-filtered-results-with-explicit-scope.md) can reduce lookups to one per distinct key; do not assume primary-key `Get` calls each hit SQL (see [transaction caching](primary-key-get-in-loop-is-transaction-cached.md)). `SetLoadFields` can reduce the columns transferred by unavoidable inner reads, but it does not eliminate the N+1 shape and must not be presented as doing so.
See sample: [`avoid-get-inside-loop-on-large-table.good.al`](avoid-get-inside-loop-on-large-table.good.al).