feat: speed up javascript munging

Perform a single pass so the work of doing `m` replacements in a string
of length `n` is O(m + n) instead of O(m * n)

For the yogalogy template this change improves the script munging step
from ~2.5ms to 0.5ms [release] (from ~17ms to 3ms [debug]).

lib/sql/src/Astrid/Query.elm

@@ -42,7 +42,7 @@ errorToString error =
             "Failure `" ++ message ++ "`"
 
         NotFound sql ->
-            "NotFound `" ++ sql ++ "`"
+            "No rows returned by a query that expected to return at least one row. `" ++ sql ++ "`"
 
 execute : Query a -> Result Error a
 execute query =