fix(tui): hide stale retry status after model switch

[netsky-prod]

Summary

• Attach the provider/model that scheduled a retry status to SessionStatus.
• Hide retry banners in the prompt footer when they belong to a previously selected model.
• Keep legacy retry statuses without model metadata visible, preserving existing behavior for old state/events.
• Add regression coverage for retry status model metadata and prompt status filtering.

Fixes #1474.

Verification

• RED before fix: SessionStatus.Info.parse(...) dropped providerID/modelID, and test/cli/tui/prompt-status.test.ts could not import the missing helper.
• bun test test/session/retry.test.ts test/cli/tui/prompt-status.test.ts --timeout 30000 - 42 pass, 0 fail.
• bun typecheck
• bunx oxlint packages/opencode/src/session/status.ts packages/opencode/src/session/processor.ts packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx packages/opencode/src/cli/cmd/tui/component/prompt/status.ts packages/opencode/test/session/retry.test.ts packages/opencode/test/cli/tui/prompt-status.test.ts - 0 errors, existing warnings only.
• git diff --check
• Pre-push bun turbo typecheck - 12 successful, 12 total.