fix: whisper model billing

- Refactor model name handling across multiple controllers to improve clarity and maintainability.
- Enhance error logging and handling for better debugging and request processing robustness.
- Update pricing models in accordance with new calculations, ensuring accuracy in the billing logic.

relay/billing/ratio/model.go

@@ -71,7 +71,7 @@ var ModelRatio = map[string]float64{
 	"text-davinci-003":                10,
 	"text-davinci-edit-001":           10,
 	"code-davinci-edit-001":           10,
-	"whisper-1":                       15,  // $0.006 / minute -> $0.006 / 150 words -> $0.006 / 200 tokens -> $0.03 / 1k tokens
+	"whisper-1":                       15,
 	"tts-1":                           7.5, // $0.015 / 1K characters
 	"tts-1-1106":                      7.5,
 	"tts-1-hd":                        15, // $0.030 / 1K characters
@@ -385,8 +385,9 @@ func GetAudioCompletionRatio(actualModelName string) float64 {
 
 // AudioTokensPerSecond is the number of audio tokens per second for each model.
 var AudioPromptTokensPerSecond = map[string]float64{
-	// $0.006 / minute -> $0.002 / 20 seconds -> $0.002 / 1K tokens
-	"whisper-1": 1000 / 20,
+	// whisper 的 API 价格是 $0.0001/sec。one-api 的历史倍率为 15，对应 $0.03/kilo_tokens。
+	// 那么换算后可得，每秒的 tokens 应该为 0.0001/0.03*1000 = 3.3333
+	"whisper-1": 0.0001 / 0.03 * 1000,
 	// gpt-4o-audio series processes 10 tokens per second
 	"gpt-4o-audio-preview":            10,
 	"gpt-4o-audio-preview-2024-12-17": 10,