[Refactor]: Core/API Split (#1506)

Refactors api folder to core, creates firm split between backend code and api frontend.

pkg/schema/localai.go

@@ -0,0 +1,39 @@
+package schema
+
+import (
+	"context"
+
+	gopsutil "github.com/shirou/gopsutil/v3/process"
+
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/metric"
+)
+
+type BackendMonitorRequest struct {
+	Model string `json:"model" yaml:"model"`
+}
+
+type BackendMonitorResponse struct {
+	MemoryInfo    *gopsutil.MemoryInfoStat
+	MemoryPercent float32
+	CPUPercent    float64
+}
+
+type TTSRequest struct {
+	Model   string `json:"model" yaml:"model"`
+	Input   string `json:"input" yaml:"input"`
+	Backend string `json:"backend" yaml:"backend"`
+}
+
+type LocalAIMetrics struct {
+	Meter         metric.Meter
+	ApiTimeMetric metric.Float64Histogram
+}
+
+func (m *LocalAIMetrics) ObserveAPICall(method string, path string, duration float64) {
+	opts := metric.WithAttributes(
+		attribute.String("method", method),
+		attribute.String("path", path),
+	)
+	m.ApiTimeMetric.Record(context.Background(), duration, opts)
+}