Callsign Migration

[Syzygicality]

Purpose

Closes #616 .
Explain the purpose of the PR here if it doesn't match the linked issue. Be sure to add a comment in the linked issue explaining the changes.

Check PR for purpose

New Changes

Explain new changes below in short bullet points.

• added to callsigns.csv (ty julian!) to resources
• created new model in aro users to store callsigns
• read csv file with csv lib and return a list of all callsigns
• checks if callsigns table is already populated. if not, migrate list contents upon app startup
• automatic B-tree indexing thanks to PostgreSQL

Testing

Explain tests that you ran to verify code functionality.

• I have unit-tested this PR. Otherwise, explain why it cannot be unit-tested.

I performed startup and callsign data was created in local database (see screenshots below)

• I have included screenshots of the tests performed below.

1. delete pre-existing data in callsigns table

2. start app with fastapi dev gs/backend/main.py

3. check db to see newly inserted callsign entries

Outstanding Changes

If there are non-critical changes (i.e. additional features) that can be made to this feature in the future, indicate them here.

update wrappers to support new callsigns table.

[github-actions]

Pull reviewers stats

Stats of the last 120 days for UWOrbital:

	User	Total reviews	Time to review	Total comments
	Adityya-K 🥇	59 ▀▀▀▀▀	1d 8h 30m	184 ▀▀▀▀
	camspec 🥈	29 ▀▀▀	1d 8h	172 ▀▀▀▀
	kepler452b123 🥉	14 ▀	6d 7h 42m ▀	37 ▀
	Yarik-Popov	4	1d 1h 41m	40 ▀
	proprogrammer504	2	7d 1h 31m ▀▀	7
	Navtajh04	1	1d 3h 20m	0
	sunray4	1	12d 21m ▀▀▀	9
	c4bae	1	13d 1h 35m ▀▀▀	2

^{⚡️ Pull request stats}

[juliansalvador727]

lgtm. its over 90000!

[proprogrammer504]

Please address comments. Though it looks good to me.

[Syzygicality]

all g