feat: enable S3 video uploads and update related configurations

- Added support for self-hosted S3 video uploads with new environment variables: OPENFRAME_ENABLE_S3_VIDEO_UPLOADS and OPENFRAME_MAX_VIDEO_UPLOAD_BYTES.
- Updated .env.example and .env.docker.example to reflect new configuration options.
- Enhanced Content Security Policy to include origins for S3-compatible storage.
- Updated dependencies for AWS SDK to support new features.
- Refactored upload logic to accommodate both Bunny and S3 upload providers.
- Updated documentation to clarify the usage of direct uploads and S3 configurations.
- Closes #11

lib/r2-upload-session.ts

@@ -0,0 +1,45 @@
+import { db } from '@/lib/db';
+
+export type CreateR2UploadSessionInput = {
+  userId: string;
+  projectId: string;
+  billedUserId: string;
+  objectKey: string;
+  thumbnailObjectKey: string;
+  declaredSizeBytes: bigint;
+  contentType: string;
+  reservationId: string | null;
+  uploadJti: string;
+  expiresAt: Date;
+};
+
+export async function createR2UploadSession(input: CreateR2UploadSessionInput) {
+  return db.videoUploadSession.create({
+    data: {
+      userId: input.userId,
+      projectId: input.projectId,
+      billedUserId: input.billedUserId,
+      objectKey: input.objectKey,
+      thumbnailObjectKey: input.thumbnailObjectKey,
+      declaredSizeBytes: input.declaredSizeBytes,
+      contentType: input.contentType,
+      reservationId: input.reservationId,
+      uploadJti: input.uploadJti,
+      expiresAt: input.expiresAt,
+    },
+  });
+}
+
+export async function cancelR2UploadSession(sessionId: string) {
+  return db.videoUploadSession.updateMany({
+    where: {
+      id: sessionId,
+      status: 'INITIATED',
+      expiresAt: { gt: new Date() },
+    },
+    data: {
+      status: 'CANCELLED',
+      consumedAt: new Date(),
+    },
+  });
+}