feat: Add "version" and "os" fields to rice database

- The rice database now includes new fields:
  - `version`: Represents the version of the rice entry.
  - `os`: Represents the operating system associated with the rice entry.
- These fields are required for all new rice entries.

refactor: Stop uploading rice.json to GitHub
- The `rice.json` file is no longer uploaded to GitHub during rice creation or updates.
- This reduces redundancy as all metadata is now managed directly in the database (Supabase).

fix: Improve exception handling with proper HTTP status codes
- Enhanced exception handling to align with standard HTTP status codes:
  - `BadRequestException` for validation errors.
  - `ConflictException` for duplicate entries.
  - `NotFoundException` for missing resources.
  - Generic `InternalServerErrorException` for unexpected errors.
- This ensures the API returns meaningful and accurate responses.

feat: Enhance rice download to act as a standard HTTP GET
- The `findOne` method now returns the raw content of the rice file directly as the response body.
- Removes unnecessary JSON wrappers, allowing the endpoint to behave like a typical HTTP GET request.
- Improved usability for clients consuming the API.

sql/ddl_1.0.0.sql

@@ -1,7 +1,9 @@
--- DROP TABLE IF EXISTS rices;
+--DROP TABLE IF EXISTS rices;
 
 CREATE TABLE rices (
     id UUID NOT NULL,                      -- Unique identifier
+    version VARCHAR(10) NOT NULL,          -- Data version
+    os VARCHAR(30) NOT NULL,               -- Operating system
     slug VARCHAR(75) NOT NULL,             -- Unique user-friendly identifier
     name VARCHAR(75) NOT NULL,             -- Name of the rice
     token UUID NOT NULL,                   -- Unique authorization token
@@ -14,7 +16,6 @@ CREATE TABLE rices (
     UNIQUE (name)                          -- Ensure name is unique
 );
 
-
 CREATE OR REPLACE FUNCTION increment_visits(slug_param TEXT)
 RETURNS VOID AS $$
 BEGIN