feat(acceptance): 建立同构验收与弹性容量体系

实现本地三节点 K3s 同构环境、脱敏生产快照、Gemini 图片和多参考图视频协议模拟、统一验收报告及故障注入。\n\n新增 Worker 容量控制器、资源与连接预算、任务恢复保护，并将生产验收拆分为 validation 执行和人工 CAS 放量。\n\n验证包括 Go 全量测试、PostgreSQL HTTP 集成测试、go vet、OpenAPI、ShellCheck、前端检查、迁移及发布脚本测试。

apps/api/internal/store/capacity_profiles_test.go

@@ -0,0 +1,51 @@
+package store
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestCapacityKindForTask(t *testing.T) {
+	tests := map[string]string{
+		"images.generations": "image",
+		"images.edits":       "image",
+		"images.vectorize":   "image",
+		"videos.generations": "video",
+		"videos.upscales":    "video",
+		"chat.completions":   "",
+	}
+	for taskKind, expected := range tests {
+		if actual := capacityKindForTask(taskKind); actual != expected {
+			t.Fatalf("capacityKindForTask(%q)=%q, want %q", taskKind, actual, expected)
+		}
+	}
+}
+
+func TestCapacityProfileValidationAndStableHash(t *testing.T) {
+	profiles := []CapacityProfileInput{
+		{
+			Kind: "image", Model: "gemini-image",
+			StableThroughputPerSecond: 10, AdmittedThroughputPerSecond: 8,
+			MaxRunning: 48, MaxQueued: 100, MaxPredictedWaitSeconds: 60,
+			Metadata: map[string]any{"profile": "P24"},
+		},
+		{
+			Kind: "video", Model: "seedance",
+			StableThroughputPerSecond: 2, AdmittedThroughputPerSecond: 1.6,
+			MaxRunning: 48, MaxQueued: 100, MaxPredictedWaitSeconds: 120,
+		},
+	}
+	if err := validateCapacityProfileInputs(profiles); err != nil {
+		t.Fatalf("valid profiles were rejected: %v", err)
+	}
+	firstHash := capacityProfileInputsHash(profiles)
+	secondHash := capacityProfileInputsHash(profiles)
+	if len(firstHash) != 64 || firstHash != secondHash {
+		t.Fatalf("capacity profile hash is unstable: %q %q", firstHash, secondHash)
+	}
+	duplicate := append([]CapacityProfileInput(nil), profiles...)
+	duplicate = append(duplicate, profiles[0])
+	if err := validateCapacityProfileInputs(duplicate); err == nil || !strings.Contains(err.Error(), "duplicate") {
+		t.Fatalf("duplicate profiles validation error=%v", err)
+	}
+}