Stabilize unrelated Codex Bazel test failures on dev

[starr-openai]

Summary

• stabilize unrelated test/runtime failures seen while validating env registry work
• keep these fixes separate so the env registry PR stays focused

Included

• tracing test stack-size fix
• js_repl remote/Bazel compatibility fix
• sqlite state-db setup fix for web search memory-mode coverage
• realtime, tool_parallelism, and unified_exec test stabilization

Validation

• validated as part of the dev Bazel reruns during env-registry work