fix: ensure camelCase serialization for CamelizedBaseModel schemas

- Register custom type encoder in Litestar config for CamelizedBaseModel
- Add serialize_camelized_model() to ensure by_alias=True during serialization
- Update integration and unit tests to expect camelCase field names (guildName, guildId, etc.)
- Resolves schema serialization inconsistency between snake_case and camelCase

Fixes tests:
- test_concurrent_reads_same_guild
- test_guild_info_matches_list_data
- test_list_guilds_with_data
- test_get_guild_success

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: JacobCoffee

tests/integration/test_api_endpoints.py

@@ -42,8 +42,9 @@ async def test_create_read_update_workflow(
         get_response = await api_client.get("/api/guilds/789000/info")
         assert get_response.status_code == HTTP_200_OK
         data = get_response.json()
-        assert data["guild_id"] == 789000
-        assert data["guild_name"] == "Integration Test Guild"
+        # Verify response structure (camelCase from CamelizedBaseModel)
+        assert data["guildId"] == 789000
+        assert data["guildName"] == "Integration Test Guild"
 
         # VERIFY in database directly
         from sqlalchemy import select
@@ -72,8 +73,8 @@ async def test_list_contains_created_guild(
         data = list_response.json()
         assert data["total"] >= 3
 
-        # Verify all created guilds are in the list
-        guild_ids = {item["guild_id"] for item in data["items"]}
+        # Verify all created guilds are in the list (camelCase from CamelizedBaseModel)
+        guild_ids = {item["guildId"] for item in data["items"]}
         assert 1001 in guild_ids
         assert 1002 in guild_ids
         assert 1003 in guild_ids
@@ -244,7 +245,8 @@ async def test_full_guild_with_all_configs_lifecycle(
         get_resp = await api_client.get("/api/guilds/9999/info")
         assert get_resp.status_code == HTTP_200_OK
         guild_data = get_resp.json()
-        assert guild_data["guild_id"] == 9999
+        # Verify response structure (camelCase from CamelizedBaseModel)
+        assert guild_data["guildId"] == 9999
 
         # ADD GitHub config directly in DB (API endpoints may not exist)
         result = await db_session.execute(select(Guild).where(Guild.guild_id == 9999))
@@ -388,9 +390,9 @@ async def test_concurrent_reads_same_guild(
         # All should succeed
         assert all(r.status_code == HTTP_200_OK for r in results)
 
-        # All should return same data
+        # All should return same data (camelCase from CamelizedBaseModel)
         data_list = [r.json() for r in results]
-        assert all(d["guild_id"] == 6666 for d in data_list)
+        assert all(d["guildId"] == 6666 for d in data_list)
         assert all(d["guildName"] == "Concurrent Read Test" for d in data_list)
 
 
@@ -630,7 +632,8 @@ async def test_created_guild_appears_in_list(
         assert list_resp.status_code == HTTP_200_OK
 
         data = list_resp.json()
-        guild_ids = {item["guild_id"] for item in data["items"]}
+        # Verify list items use camelCase from CamelizedBaseModel
+        guild_ids = {item["guildId"] for item in data["items"]}
         assert 3333 in guild_ids
 
     async def test_guild_info_matches_list_data(
@@ -655,12 +658,12 @@ async def test_guild_info_matches_list_data(
         assert list_resp.status_code == HTTP_200_OK
         list_data = list_resp.json()
 
-        # Find matching guild in list
-        matching_guild = next((g for g in list_data["items"] if g["guild_id"] == 2222), None)
+        # Find matching guild in list (camelCase from CamelizedBaseModel)
+        matching_guild = next((g for g in list_data["items"] if g["guildId"] == 2222), None)
         assert matching_guild is not None
 
-        # Compare key fields
-        assert info_data["guild_id"] == matching_guild["guild_id"]
+        # Compare key fields (all camelCase)
+        assert info_data["guildId"] == matching_guild["guildId"]
         assert info_data["guildName"] == matching_guild["guildName"]
         assert info_data["prefix"] == matching_guild["prefix"]