Throttle baseline runs, record interrupted runs, and put the hour in the MSI version

[rodchristiansen]

Baseline throttle (matches the Mac's #39/#40)

• Applied only after the preflight returns baseline; provisioning is never limited.
• `C:\ProgramData\ManagedBootstrap\baseline.json` holds `end_time`, `status`, `consecutive_failures`.
• Completed baseline under `BaselineMinIntervalHours` (default 144; ADMX, policy, settings registry): skip.
• Failed / partial_failure / interrupted: one retry after 24 h, then the full interval.
• `.bootstrap_force` exempts the run (the preflight consumes it). A provisioning run clears the record.
• A throttled run ends as `skip` with the reason logged and downloads no item.
• Baseline items whose manifest `hash` is in the install ledger are skipped before download.

Interrupted runs

• A run that finds last-run.json still at `running` holds the single-instance lock, so that run is dead. Its session.json is relabelled `interrupted`; an interrupted baseline counts as a failure for the throttle.

MSI version

• ProductVersion is `YY.M.DDHH.MM` (2026.10.05.0951 → 26.10.509.51), derived in the wixproj from `-p:FullVersion`. File versions, `--version`, `HKLM\SOFTWARE\BootstrapMate\Version`, logs and tags keep `YYYY.MM.DD.HHMM`.

Tested on a test PC (signed)

• 2026.10.05.1100 (26.10.511.0) → 2026.10.05.1200 (26.10.512.0): one product entry, registry Version 2026.10.05.1200.
• The upgrade ran while a baseline was in progress: Restart Manager shut it down (`RESTART MANAGER: Successfully shut down all applications` in the verbose log). The next run logged it, relabelled the session `interrupted`, and skipped with "next baseline allowed after 2026-10-06 10:03".
• `dotnet test`: 86 pass.