ludic.base: tb_reserve and imap_reserve size a table up front; HandlePool (a slot and a generation, nothing made after hd_pool_new, past its capacity a panic naming it); kept_push is the one declared grow, and every growth path left says its bound in @alloc_ok

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/ludic.base/text_intern.ludic

@@ -34,6 +34,7 @@ function sb_same(sb: StrBuf, s: string) -> bool {
 }
 
 # the table's string for the buffer's bytes
+@alloc_ok("intern: one string per distinct text, up to the table's most, then kept")
 export function sb_intern(sb: StrBuf, tb: StrTable) -> string {
   let h = sb_hash(sb)
   let mask = len(tb.hs) - 1