Add context.Context parameter to all API methods

Enable request timeout and cancellation control by adding context.Context
as the first parameter to all SDK API methods. This allows users to:
- Set per-request timeouts
- Cancel in-flight requests
- Pass request-scoped values

block/block.go

@@ -1,6 +1,7 @@
 package block
 
 import (
+	"context"
 	"fmt"
 
 	"git.dragonchain.com/dragonchain/dragonchain-prime-sdk-go/client"
@@ -15,10 +16,10 @@ func NewBlockClient(c *client.Client) *BlockClient {
 	return &BlockClient{client: c}
 }
 
-func (bc *BlockClient) Get(blockID string) (*models.Block, error) {
+func (bc *BlockClient) Get(ctx context.Context, blockID string) (*models.Block, error) {
 	var resp models.Block
 	path := fmt.Sprintf("/api/v1/block/%s", blockID)
-	err := bc.client.Get(path, &resp)
+	err := bc.client.Get(ctx, path, &resp)
 	if err != nil {
 		return nil, err
 	}