fix rt updates in table

[luke-lombardi]

Summary by cubic

Fixes real-time timing in the sandbox table by backfilling missing metrics from canonical container events and recent history. Ensures time-to-started, time-to-interactive, and lifetime are accurate for both active and completed containers.

• Bug Fixes
  • Hydrates missing timing fields from container event streams; bounded by sandboxTimingHydrationLimit.
  • Merges recent stub history into app stats to cover partial app history; bounded by sandboxStatsFallbackStubLimit.
  • Applies timing to active and inactive rows; respects stored lifetime for completed runs.
  • Caps container history lookups at sandboxContainerHistoryLimit and de-dupes by container.
  • Bench: adds --sandbox-app-name to set the sandbox app namespace.
  • SDK: clarifies Sandbox.name assigns the sandbox to an app namespace.

^{Written for commit 56c25ee. Summary will update on new commits.}