…int (#143)

Adds GET /api/cross/{v}, which issues two DISTINCT prepared queries with an
identical one-int parameter signature ("SELECT ? AS v" and "SELECT ? + 1000 AS
w") inside a single request. When both PREPAREs predate the record window
(orphaned mocks, expectedQuery==""), this exercises the matcher's
parameter-aware orphaned-EXECUTE path: a param-only match must not serve query
B's row for query A. a must echo v and b must be v+1000.

Consumed by the keploy/keploy java_linux tidb-stmt-cache e2e job.

Signed-off-by: slayerjain <shubhamkjain@outlook.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>