fix: raise provider HTTP timeouts from 30s to 10min

30-second resty client timeout was killing long streaming responses
mid-generation. Models with large output windows (e.g. deepseek-v4-pro
at 384K max_tokens) routinely exceed 30s. Raised all providers to
10 minutes (Ollama already at 15min, unchanged). Circuit breaker
recovery timeout raised from 30s to 5min.

internal/providers/circuit_breaker.go

@@ -17,7 +17,7 @@ func NewCircuitBreakerProvider(p Provider) Provider {
 	name := p.Name()
 	var maxRequests uint32 = 5
 	var interval = 60 * time.Second
-	var timeout = 30 * time.Second
+	var timeout = 5 * time.Minute
 
 	settings := gobreaker.Settings{
 		Name:        name,

internal/providers/deepseek.go

@@ -22,7 +22,7 @@ type DeepSeekProvider struct {
 
 func NewDeepSeekProvider(cfg config.DeepSeekConfig, apiKey string) *DeepSeekProvider {
 	return &DeepSeekProvider{
-		client: resty.New().SetTimeout(30 * time.Second),
+		client: resty.New().SetTimeout(10 * time.Minute),
 		config: cfg,
 		apiKey: apiKey,
 	}

internal/providers/gemini.go

@@ -20,7 +20,7 @@ type GeminiProvider struct {
 
 func NewGeminiProvider(cfg config.GeminiConfig, apiKey string) *GeminiProvider {
 	return &GeminiProvider{
-		client: resty.New().SetTimeout(30 * time.Second),
+		client: resty.New().SetTimeout(10 * time.Minute),
 		config: cfg,
 		apiKey: apiKey,
 	}

internal/providers/grok.go

@@ -19,7 +19,7 @@ type GrokProvider struct {
 
 func NewGrokProvider(cfg config.GrokConfig, apiKey string) *GrokProvider {
 	return &GrokProvider{
-		client: resty.New().SetTimeout(30 * time.Second),
+		client: resty.New().SetTimeout(10 * time.Minute),
 		config: cfg,
 		apiKey: apiKey,
 	}

internal/providers/moonshot.go

@@ -20,7 +20,7 @@ type MoonshotProvider struct {
 
 func NewMoonshotProvider(cfg config.MoonshotConfig, apiKey string) *MoonshotProvider {
 	return &MoonshotProvider{
-		client: resty.New().SetTimeout(30 * time.Second),
+		client: resty.New().SetTimeout(10 * time.Minute),
 		config: cfg,
 		apiKey: strings.TrimSpace(apiKey),
 	}

internal/providers/openai.go

@@ -20,7 +20,7 @@ type OpenAIProvider struct {
 
 func NewOpenAIProvider(cfg config.OpenAIConfig, apiKey string) *OpenAIProvider {
 	return &OpenAIProvider{
-		client: resty.New().SetTimeout(30 * time.Second),
+		client: resty.New().SetTimeout(10 * time.Minute),
 		config: cfg,
 		apiKey: apiKey,
 	}