fix: Apply limit on matching rows, not read rows (#102)

Binary log browser is unintuitive to use with filters, the "max lines"
is applied before filtering.

Since we have bounded size of bin log (100MB per file) just reading
everything which is ~= 100MB of text is fine IMO.

agent/database.py

@@ -30,7 +30,7 @@ def search_binary_log(
             f"mysqlbinlog --short-form --database {database} "
             f"--start-datetime '{start_datetime}' "
             f"--stop-datetime '{stop_datetime}' "
-            f" {log} | grep -Piv '{LINES_TO_SKIP}' | head -n {max_lines}"
+            f" {log} | grep -Piv '{LINES_TO_SKIP}'"
         )
 
         DELIMITER = "/*!*/;"
@@ -55,6 +55,8 @@ def search_binary_log(
                             ),
                         }
                     )
+                    if len(events) > max_lines:
+                        break
         return events
 
     @property