Revert incorrect Claude interrupt flags that broke autonomous wake

Remove `pendingInterruptAbort = false` from startTurn() and
`queryRestartNeeded = true` from requestCancel(). Both violated the
existing coordination contracts:

- pendingInterruptAbort must only be cleared by the stream pump at its
  safe consumption points, not eagerly by the turn lifecycle
- queryRestartNeeded is for transport-level restarts (config changes,
  rewind), not for normal interrupt/cancel flows — setting it on every
  cancel killed the Claude process and destroyed background tasks

The actual fix for the send-during-tool-call bug was the manager-side
pendingForegroundRun settlement wait added in the previous commit.

packages/server/src/server/agent/providers/claude-agent.ts

@@ -1325,7 +1325,6 @@ class ClaudeAgentSession implements AgentSession {
     const turnId = this.createTurnId("foreground");
     this.activeForegroundTurnId = turnId;
     this.foregroundHasVisibleActivity = false;
-    this.pendingInterruptAbort = false;
     this.transitionTurnState("foreground", "foreground turn started");
     this.clearRecentStderr();
 
@@ -1344,7 +1343,6 @@ class ClaudeAgentSession implements AgentSession {
         provider: "claude",
         reason: "Interrupted",
       });
-      this.queryRestartNeeded = true;
       void this.interruptActiveTurn().catch((error) => {
         this.logger.warn({ err: error }, "Failed to interrupt during cancel");
       });