Wire Current Allocation card to real backend data (#602)

[DanielRukwasha]

Related to #602

Replaces the hardcoded placeholder numbers on the Department Portal's 'Current Allocation' card with real data:

• Fixed \database/migrate_db.sh, which was missing \�pp.models.allocation.Allocation\ entirely — the \�llocation\ table was never being created via migrations.
• Added demo \Allocation\ seed rows per department (none existed before).
• \departmentPortal()\ now queries the department's \Allocation\ row for the current open term, and computes real 'used' counts per hour-band (10/12/15/20 primary, 5/10 secondary) by counting non-denied \LaborStatusForm\s — reusing the same denied-filter pattern already used elsewhere in the app (\statusFormFunctions.py).
• Added a best-effort 'break hours used' calculation (summed from \contractHours\ on break-term forms), since nothing previously tracked this.
• Added 'Primary' / 'Secondary' section titles above the hour-band breakdown lists for clarity.
• Removed the non-functional 'Request Allocation' button (no destination page exists yet) and relabeled 'AY' to 'Term' in the term display.

Not yet done / out of scope for this PR: the 'Manage Allocations' button still points nowhere (destination page depends on other open issues), and there's no access-control check restricting a department's allocation data to Labor admins + that department's own staff.

Tested locally end-to-end in the devcontainer against real seeded data across multiple departments.

[MImran2002]

your branch has conflict and is this final PR or draft PR

[DanielRukwasha]

@MImran2002 this is the final PR, not a draft. The merge conflict is resolved now too — branch is up to date with allocation_card and mergeable/clean. Ready for another look whenever you get a chance.