fix: address the four suppressed findings from review round 20 (#2144)

Copilot reported "no new comments" again, with four real findings in its
suppressed block.

- The web in-flight lock was global, so a pending clear for server A silently
  swallowed a click on server B's — even though the callback explicitly
  supports clearing a non-active server. Keyed by server id now.
- `else if (!isActive)` skipped the resume-snapshot cleanup when the target IS
  active but has no client yet, which is reachable while a session is being
  built or torn down. The clear then emptied storage and left stale OAuth
  recovery state pointing at credentials that no longer existed.
- `revocationAuthMethods` returned `[]` for an omitted
  `revocation_endpoint_auth_methods_supported`, which does not enforce RFC
  8414's default: an empty list means "the metadata said nothing" to
  `selectClientAuthMethod`, which then honors the registration's own
  `token_endpoint_auth_method`. The default is named literally now.
- The `v8 ignore` on the CLI budget branch was wrong, and the challenge to it
  was right: an injected `budgetMs` of zero reaches it directly, through a seam
  I had added myself the round before. Removed, and covered by a test that
  asserts no request is made and the unattempted key is reported.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0177mPHAdECD18nLLCTwR5rh
Signed-off-by: cliffhall <cliff@futurescale.com>

clients/cli/src/clear-stored-auth-for-relogin.ts

@@ -123,10 +123,6 @@ async function sendPlans(
     // may still be live when the key held no grant at all — a false alarm, and
     // one that outranks the real outcome under the failure-first rule below.
     const needsNetwork = plan.outcome === undefined;
-    /* v8 ignore next 10 -- A bound, not a path: `withDeadline` fails any plan
-       that reaches the deadline, so a preceding plan cannot both succeed and
-       leave zero budget. This exists so a plan reached with nothing left is
-       reported rather than firing a request it would immediately abandon. */
     if (needsNetwork && remainingMs <= 0) {
       // Overrides an earlier success rather than deferring to it: this key's
       // grant may still be live at the authorization server, and that is the