569 setup fastapi caching (#603)

# Purpose
Closes #569.
Set up fastAPI caching for endpoints and create documentation for
implementing caching for future endpoints.

# New Changes
Explain new changes below in short bullet points.
- Added fastapi-caching2 to requirements
- initialize cache in lifespan.py
- add caching to available endpoints
Documentation for adding caching to future endpoints as they are
developed will be added to the team documentation site

# 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 have tested this PR on a board if the code will run on a board
(Only required for firmware developers).
- [ ] I have tested this PR by running the ARO website (Only required if
the code will impact the ARO website).
- [ ] I have tested this PR by running the MCC website (Only required if
the code will impact the MCC website).
- [x] I have included screenshots of the tests performed below.
<img width="944" height="36" alt="image"
src="https://github.com/user-attachments/assets/d5ca5fba-80b0-41df-9664-485c4ece999d"
/>
tests have been run for api, everything passes. The warnings are not
related to my changes
# 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.

Author: LegendaryAKx3

gs/backend/api/lifespan.py

@@ -2,6 +2,8 @@
 from contextlib import asynccontextmanager
 
 from fastapi import FastAPI
+from fastapi_cache import FastAPICache
+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
@@ -10,6 +12,9 @@
 @asynccontextmanager
 async def lifespan(_: FastAPI) -> AsyncGenerator[None, None]:
     """Lifecycle event for the FastAPI app."""
+    # Initialize FastAPI Cache (in memory cache)
+    FastAPICache.init(InMemoryBackend())
+
     # Must all the get_db_session each time when pass it into a separate function.
     # Otherwise, will get transaction is inactive error
     setup_database(get_db_session())

gs/backend/api/v1/mcc/endpoints/main_commands.py

@@ -1,4 +1,5 @@
 from fastapi import APIRouter
+from fastapi_cache.decorator import cache
 
 from gs.backend.api.v1.mcc.models.responses import MainCommandsResponse
 from gs.backend.data.data_wrappers.mcc_wrappers.main_command_wrapper import get_all_main_commands
@@ -7,6 +8,7 @@
 
 
 @main_commands_router.get("/")
+@cache(expire=300)  # Cache for 5 minutes
 async def get_main_commands() -> MainCommandsResponse:
     """
     Gets the main commands that are available for the MCC

requirements.txt

@@ -3,6 +3,7 @@ requests==2.31.0
 pyserial==3.5
 skyfield==1.48
 fastapi[standard]==0.115.0
+fastapi-cache2==0.2.1
 sqlmodel==0.0.22
 jinja2==3.1.6
 toml==0.10.2