Two LSP freshness bugs reported by @tobific (#108882, #108881):
- `_current_diags_async()` keyed the client lookup by the enclosing
workspace root while `_get_or_spawn()` stores single-root servers under
`srv.resolve_root(...)` (a nested package.json project). The lookup
returned [] for a live client with diagnostics, so the delta baseline was
refreshed from nothing. Use the same resolved-root key.
- `open_or_change()` published `_DocState.version` only after awaiting the
didChange write. A versionless publishDiagnostics read during that await
was credited with the OLD version and judged stale once the send resumed.
Bump the version before the send; a failed send (swallowed by
`_send_notification`) leaves a version nothing satisfies, i.e. "no
verdict", which is the existing contract.
The mock server gains a push-only `versionless` script so the race is
reproducible without a real language server.
Teknium
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