April brought good news for the Tri-Cities housing market. Buyers got more choices, but not enough to tip the scales. Expect a tight, fast-moving market through early summer. The real test is yet to come. If listings hold their gains while sales stay hot, that’s the first sign of genuine breathing room ahead. Active listings climbed to 2,373 in April, up more than 6% from March. Inventory is still below where supply was before the pandemic, but …