Aarav Mehta At 02:17 a.m., my phone rang with the same number that had stopped calling me eight years ago, a ghost of ten digits branded into the inside of my skull, and by the second ring my ribs felt like a locked drawer someone was rummaging through; I swiped, whispered “hello,” and heard only the soft clicking of a line held slightly open, air carrying the distant hum of traffic and a faint three-note whistle that I recognized from a forgotten Kolkata monsoon when an informant named R—had told me you could train a bird to return home but…