add CRUD operations for routes (DEV-58)

[ivymxu]

Jira ticket link

Jira ticket

Implementation description

• Added CRUD for the Routes resource

Steps to test

1. Navigate to http://localhost:8000/docs
2. Create a route via POST /routes with a valid payload
3. List routes via GET /routes, confirm the new route appears
4. Get by ID via GET /routes/{route_id}, confirm 200 returned, try a fake ID and confirm 404
5. Update via PUT /routes/{route_id}, confirm fields update, submit an empty body {} and confirm 400
6. Delete via DELETE /routes/{route_id}, confirm 204, retry the same ID and confirm 404

What should reviewers focus on?

• Empty update payload update_route / update_agency raise ValueError("No update fields were provided.") rather than silently no-oping
• Datetime normalization in create_route], check that timezone-aware datetimes are converted to UTC and stripped before persistence

Checklist

Format for branch, commit, and PR title: docs/GIT.md.

• My branch name includes the Jira ticket key
• My PR name is descriptive and in imperative tense
• My PR name includes the Jira ticket key
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• My commit messages include the Jira ticket key
• I have run the appropriate linter(s)
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR

[Copilot]

Pull request overview

This PR implements full CRUD support for the Routes resource in the FastAPI backend and refactors Agencies to follow the same service-layer pattern, plus some minor import/formatting cleanups across the repo.

Changes:

• Implemented Routes CRUD endpoints and added a route_service business-logic layer.
• Refactored Agencies endpoints to use a new agency_service business-logic layer with consistent error handling and empty-update validation.
• Performed minor import ordering/formatting adjustments in backend modules and migrations.

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
frontend/app/page.tsx	Removes an extraneous blank line in the home page layout.
backend/setup.py	Reorders setuptools imports.
backend/server.py	Adds a blank line between stdlib and third-party imports.
backend/migrations/versions/2adf14c14d9c_initial.py	Reorders imports in migration.
backend/migrations/versions/20260215_hafb_tables.py	Reorders imports in migration.
backend/migrations/versions/20260215_complete_schema_redesign.py	Reorders imports in migration.
backend/migrations/env.py	Adjusts import ordering for settings/models registration.
backend/app/services/routes.py	New: service layer implementing list/get/create/update/delete for routes incl. datetime normalization.
backend/app/services/agencies.py	New: service layer implementing CRUD operations for agencies incl. empty-update validation and IntegrityError handling.
backend/app/services/init.py	New: service package exports (agency_service, route_service).
backend/app/models/base.py	Import formatting changes only.
backend/app/models/init.py	Import formatting changes only.
backend/app/main.py	Import ordering cleanup.
backend/app/database.py	Import formatting cleanup.
backend/app/config.py	Import ordering cleanup.
backend/app/api/routes.py	Implements full CRUD endpoints for routes, delegating to route_service.
backend/app/api/agencies.py	Refactors endpoints to delegate to agency_service and adds consistent error handling / 204 response.

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