Release 3.2.9: fix telemetry spool reclamation and update dashboard dependencies

[dependabot]

Transport spools can exceed their allowance after ingestion has caught up because committed rotated files are still held by writers or reclamation is blocked. This release improves safe cleanup and exposes the cause without discarding unread data or resetting reporting history.

• Require the committed EOF signature and a Linux read lease before reclaiming a spool; replay same-size changes beyond the prefix fingerprint and reject pathname/inode races.
• Drain successful 32-file batches every second, keep blocked retries bounded, and retry nginx log reopening for writer-held nginx archives.
• Close administrative event streams after each event, so idle dashboard auditing cannot pin rotated files.
• Show collection and reclamation separately in capacity reports, CLI, dashboard and alerts, including byte totals, failure reasons, errno and bounded file details.
• Exclude already committed closed transport from sizing demand, retain pressure history, and withhold advice until fresh evidence is available. Stale reports label collection and reclamation stale.
• Update Vite to 8.3.3 and the React plugin to 6.1.2, rebuild the dashboard, merge current main, and synchronize all numbered Docker defaults for the next rollout.

Release-Version: 3.2.9

Validation: 109 focused Python tests pass (two environment skips), 36 release/workflow tests pass, all 46 frontend tests pass, dashboard build succeeds, shellcheck passes, and the diff is clean. The full local runner was exercised; three live upgrade-owner test groups are blocked by this environment's PID/proc namespace. GitHub's Ubuntu, systemd and amd64/arm64 Docker acceptance checks provide the final deployment validation.

After merge, the existing release workflow accepts both image architectures before publishing 3.2.9 and updating latest. The precise cause of an existing live reclamation failure is available through the new getbible capacity --json snapshot; unsupported filesystem leases or ownership problems still require correcting that environment.