fix(actions): reject if client is disabled (#1626)

* fix(actions): error on disabled client

* fix(actions): sql scan args

* refactor: download client cache for actions

* fix: tests client store

* fix: tests client store and int conversion

* fix: tests revert findbyid ctx timeout

* fix: tests row.err

* feat: add logging to download client cache

internal/download_client/cache.go

@@ -0,0 +1,48 @@
+package download_client
+
+import (
+	"sync"
+
+	"github.com/autobrr/autobrr/internal/domain"
+)
+
+type ClientCacheStore interface {
+	Set(id int32, client *domain.DownloadClient)
+	Get(id int32) *domain.DownloadClient
+	Pop(id int32)
+}
+
+type ClientCache struct {
+	mu      sync.RWMutex
+	clients map[int32]*domain.DownloadClient
+}
+
+func NewClientCache() *ClientCache {
+	return &ClientCache{
+		clients: make(map[int32]*domain.DownloadClient),
+	}
+}
+
+func (c *ClientCache) Set(id int32, client *domain.DownloadClient) {
+	if client != nil {
+		c.mu.Lock()
+		c.clients[id] = client
+		c.mu.Unlock()
+	}
+}
+
+func (c *ClientCache) Get(id int32) *domain.DownloadClient {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+	v, ok := c.clients[id]
+	if ok {
+		return v
+	}
+	return nil
+}
+
+func (c *ClientCache) Pop(id int32) {
+	c.mu.Lock()
+	delete(c.clients, id)
+	c.mu.Unlock()
+}