R04:P2 - every analysis derives from one process-wide bound base compilation via
ReplaceSyntaxTree (the scoped service keeps its current compilation); every entry point
takes the request token, the endpoints bind RequestAborted and answer 499 on abort, and
the Monaco providers abort their fetch when Monaco cancels the request.
R04:P3 - the catalog snapshot carries a sorted, de-duplicated string[] (binary-search
prefix completion) and an Ordinal path->info dictionary, built once per snapshot.
R04:S1 - Diagnose emits an OTSCRIPT_SETVTAG_INERT warning for each ctx.SetVirtualTag
call. It is a warning, so editor-accepts == publish-accepts still holds.
Refs #745
Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT
Joseph Doherty