feat(pallets): finish changing location of pallet

[JanKolo04]

Summary

Adds a destination to pallets alongside the existing status and location, so logistics can see where each pallet
is and where it should go. Destination is cleared on arrival (arrived_at stamped), so transit state is a property
of the row rather than a string comparison in the UI. Destination changes ride the existing append-only
pallet_movements ledger (new from_destination / to_destination), giving one timeline for both "who moved it" and
"who redirected it".

New Pallet Logistics view (/logistics/pallets, Operator/Supervisor/Admin) lists pallets live with status,
location, destination, transit state and arrival — filterable by status and location/destination — plus a card to
re-route a pallet without moving it. The Move Pallet terminal gains an optional destination field.

Existing pallets are unaffected: both new columns are nullable and default to unset.

Type of change

• Bug fix
• New feature
• Refactor / cleanup
• Documentation
• Other:

Related issue

Closes #101

Testing

New tests/Feature/Web/Logistics/PalletDestinationTest.php — 18 cases: destination assign/keep/clear, arrival
stamping, stale-arrival clearing, re-route without an operator, validation 422 (length, shipped pallet, soft-deleted),
guest + wrong-role authorization, view render, shape allowlists, and a full pallet journey asserted across the whole
ledger.

• Tested manually in browser
• php artisan test passes — 1988 tests, 0 failures (run as php -d memory_limit=2G vendor/bin/phpunit; the
  artisan test wrapper OOMs locally at the default 128M memory_limit, unrelated to this change — the suite peaks at
  ~329MB)
• Tested as Operator / Supervisor / Admin role — covered by feature tests (guest redirect, role-less 403, Operator
  write paths, Admin CRUD), not manually in a browser

Checklist

• No .env secrets committed
• Migration added if schema changed — pallets.destination + arrived_at, pallet_movements.from_destination +
  to_destination
• $fillable updated if new model columns added — Pallet and PalletMovement
• No raw SQL with user input (use Eloquent / Query Builder)
• CSRF protection in place for any new forms — Inertia useForm over the standard web middleware
• composer audit clean — 37 pre-existing advisories across 11 packages; no dependencies added or changed by this
  PR

Notes for reviewers

• New columns were added to the pallets and pallet_movements Electric shapes — without that the UI never sees them
  (there's a test guarding it).
• Admin pallet CRUD writes destination without a ledger entry, matching how it already treats location. Logged
  paths are the move terminal and the logistics view.
• Clearing an already-empty destination still appends a ledger row; happy to suppress that if reviewers prefer a
  ?PalletMovement return.

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