Callsign Migration (#623)

# 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.
- [x] 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)

- [x] I have included screenshots of the tests performed below.

1. delete pre-existing data in callsigns table
<img width="274" height="31" alt="image"
src="https://github.com/user-attachments/assets/ddb5175d-0020-45b0-be72-5ce3242403a8"
/>

2. start app with ```fastapi dev gs/backend/main.py``` 
<img width="350" height="213" alt="image"
src="https://github.com/user-attachments/assets/9198f32d-d533-463d-8c8d-3be7df050ff8"
/>

3. check db to see newly inserted callsign entries
<img width="299" height="290" alt="image"
src="https://github.com/user-attachments/assets/55ea51d8-6902-4b51-ac7b-f600bf156051"
/>

# 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.

Author: Syzygicality

.pre-commit-config.yaml

@@ -9,7 +9,7 @@ repos:
       - id: end-of-file-fixer
         exclude: '((libs|hal)/.*|\.(ts|tsx|css|html|json|md|yaml|yml|ipynb)$)'
       - id: check-added-large-files
-        exclude: "(libs|hal)/.*"
+        exclude: "(libs|hal)/.*|gs/backend/data/resources/callsigns\\.csv$"
   - repo: https://github.com/pre-commit/mirrors-clang-format
     rev: v17.0.6
     hooks:

gs/backend/api/lifespan.py

@@ -6,7 +6,7 @@
 from fastapi_cache.backends.inmemory import InMemoryBackend
 
 from gs.backend.data.database.engine import get_db_session, setup_database
-from gs.backend.data.resources.utils import add_main_commands
+from gs.backend.data.resources.utils import add_callsigns, add_main_commands
 
 
 @asynccontextmanager
@@ -19,4 +19,5 @@ async def lifespan(_: FastAPI) -> AsyncGenerator[None, None]:
     # Otherwise, will get transaction is inactive error
     setup_database(get_db_session())
     add_main_commands(get_db_session())
+    add_callsigns(get_db_session())
     yield