Add Employee vs Client user type and filter time/reports by employee (#14) (#15)

## Summary

- Adds `UserProfile` model with mutually exclusive **Employee** / **Client** types
- Replaces auto-Employee signal with auto-Client profile on user creation
- Data migration: users with time log entries → Employee; others → Client (orphan Employee rows removed)
- Admin UI at `/financial/manage_users` to set any user's type; profile page shows current type
- **Employees** can log time; **Clients** get read-only access to reports and time logs
- Time logs, reports, and dashboard filter to employees only
- 14 new tests covering signals, type switching, access control, and filtering

## Design decisions (from issue Q&A)

1. Client login = read-only financial access (reports + time logs, no edit/log time)
2. Employee and Client are strictly mutually exclusive
3. Admins (superusers) can change type via Manage Users
4. Bulk migration applied for existing users

## Test plan

- [x] `python manage.py test financial.tests` (14 tests pass)
- [x] `python manage.py test public.tests` (21 tests pass)
- [ ] Run migration on staging: `python manage.py migrate`
- [ ] Verify admin can set user types at `/financial/manage_users`
- [ ] Verify employee can log time at `/financial/timekeeping`
- [ ] Verify client sees reports/time logs read-only, cannot log time
- [ ] Verify employee filter dropdown excludes clients

Closes #14

Reviewed-on: #15

.gitea/workflows/deploy.yml

@@ -1,33 +1,20 @@
 name: Deploy Company Site
 
 on:
-  push:
+  workflow_run:
+    workflows: [Unit Tests]
+    types: [completed]
     branches: [master]
 
 jobs:
-  test:
-    runs-on: self-hosted
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Set up Python environment
-        run: |
-          python3 -m venv .venv
-          .venv/bin/pip install --upgrade pip
-          .venv/bin/pip install -r requirements.txt
-
-      - name: Run unit tests
-        run: |
-          cd company_site
-          ../.venv/bin/python manage.py test
-
   deploy:
-    needs: test
+    if: gitea.event.workflow_run.conclusion == 'success' && gitea.event.workflow_run.event == 'push'
     runs-on: self-hosted
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+        with:
+          ref: ${{ gitea.event.workflow_run.head_sha }}
 
       - name: Deploy to live site
         run: bash scripts/deploy.sh "${{ gitea.workspace }}"

.gitea/workflows/unittests.yml

@@ -0,0 +1,25 @@
+name: Unit Tests
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  test:
+    runs-on: self-hosted
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Python environment
+        run: |
+          python3 -m venv .venv
+          .venv/bin/pip install --upgrade pip
+          .venv/bin/pip install -r requirements.txt
+
+      - name: Run unit tests
+        run: |
+          cd company_site
+          ../.venv/bin/python manage.py test