Codex SwitchBridge 0.3.0

What's new\n\n- Refreshed VS Code views for accounts, API providers, status, and a new usage overview.\n- Added total and per-account/provider input, output, cached, and reasoning token metrics.\n- Preserved attribution through account/API switching, renames, storage moves, multiple windows, and separate CODEX_HOME directories.\n- Reduced reload noise and made provider selection durable before automatic reload.\n- Hardened history migration, destination collision handling, path validation, secret masking, and cross-process locks.\n\nToken numbers are calculated from local Codex rollout token-count events. They are usage telemetry, not provider billing or cost data.\n\n## Verification\n\n- Core tests: 101 passed\n- VS Code tests: 318 passed\n- Migration tests: 11 passed\n- Dependency audit: 0 vulnerabilities\n- VSIX archive verified and installed locally as version 0.3.0