Add logging and safeguards for org/profile switching

[continue]

Problem

VS Code extension randomly switched organization from "Continue" to "Personal" even though the user was still using Awesome Models, causing a "You have exceeded the chat limit for the Free Trial" error.

Related Slack thread: https://continuedev.slack.com/archives/C060AV775UZ/p1761007831053639?thread_ts=1761007831.053639&cid=C060AV775UZ

Changes

This PR adds comprehensive logging and telemetry to diagnose and prevent unexpected organization switches:

1. Telemetry Tracking

• Added org_switch event to track when users explicitly switch organizations
• Added org_fallback event to detect when saved org selection is not available

2. Enhanced Logging

• Log all org and profile switch events with before/after details
• Log when saved org selection falls back to default
• Detect and log unexpected org changes during config reloads
• Improved error messages for invalid org/profile switches

3. Better Error Handling

• More descriptive error messages when attempting to switch to non-existent org/profile
• Error logging before throwing to ensure issues are captured

Testing

The changes add observability without modifying core logic, making them low-risk. The logging will help us:

1. Identify when and why unexpected org switches occur
2. Track frequency of org fallbacks
3. Detect patterns in the reported issue

---

This agent session was co-authored by karthik and Continue.

---

Summary by cubic

Adds logging, telemetry, and safeguards to org/profile switching to diagnose and prevent unexpected org changes (e.g., switching to Personal) that cause free-trial limit errors. Improves observability without changing core switching logic.

• Bug Fixes
  • Detect unexpected org changes during config reload; record previous/new org and reason.
  • Validate org/profile IDs before switching; pre-log and throw clear errors on invalid targets.
  • Capture telemetry for explicit switches and fallbacks (org_switch, org_fallback) with before/after details and available orgs.