Add four stub analytics adapters (metrica, ctm, variocube, dynatrace)

src/observability/analytics/adapters/ctm.ts

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+import type { AnalyticsAdapter, AnalyticsProps } from "../types.js";
+import { emitEvent } from "../sink.js";
+
+export class CtmAdapter implements AnalyticsAdapter {
+  readonly name = "ctm" as const;
+
+  async load(): Promise<void> {
+    // Stub: real CTM script loads in Phase 2A
+  }
+
+  track(event: string, props: AnalyticsProps = {}): void {
+    emitEvent({ kind: "track", name: event, props, provider: this.name, ts: new Date().toISOString() });
+  }
+
+  page(url: string, props: AnalyticsProps = {}): void {
+    emitEvent({ kind: "page", name: url, props, provider: this.name, ts: new Date().toISOString() });
+  }
+}

src/observability/analytics/adapters/dynatrace.ts

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+import type { AnalyticsAdapter, AnalyticsProps } from "../types.js";
+import { emitEvent } from "../sink.js";
+
+export class DynatraceAdapter implements AnalyticsAdapter {
+  readonly name = "dynatrace" as const;
+
+  async load(): Promise<void> {
+    // Stub: real Dynatrace (Key-Astrom) script loads in Phase 2A
+  }
+
+  track(event: string, props: AnalyticsProps = {}): void {
+    emitEvent({ kind: "track", name: event, props, provider: this.name, ts: new Date().toISOString() });
+  }
+
+  page(url: string, props: AnalyticsProps = {}): void {
+    emitEvent({ kind: "page", name: url, props, provider: this.name, ts: new Date().toISOString() });
+  }
+}

src/observability/analytics/adapters/metrica.ts

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+import type { AnalyticsAdapter, AnalyticsProps } from "../types.js";
+import { emitEvent } from "../sink.js";
+
+export class MetricaAdapter implements AnalyticsAdapter {
+  readonly name = "metrica" as const;
+
+  async load(): Promise<void> {
+    // Stub: real Yandex.Metrica script loads in Phase 2A (after A7 resolves)
+  }
+
+  track(event: string, props: AnalyticsProps = {}): void {
+    emitEvent({ kind: "track", name: event, props, provider: this.name, ts: new Date().toISOString() });
+  }
+
+  page(url: string, props: AnalyticsProps = {}): void {
+    emitEvent({ kind: "page", name: url, props, provider: this.name, ts: new Date().toISOString() });
+  }
+}

src/observability/analytics/adapters/variocube.ts

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+import type { AnalyticsAdapter, AnalyticsProps } from "../types.js";
+import { emitEvent } from "../sink.js";
+
+export class VariocubeAdapter implements AnalyticsAdapter {
+  readonly name = "variocube" as const;
+
+  async load(): Promise<void> {
+    // Stub: real Variocube script loads in Phase 2A
+  }
+
+  track(event: string, props: AnalyticsProps = {}): void {
+    emitEvent({ kind: "track", name: event, props, provider: this.name, ts: new Date().toISOString() });
+  }
+
+  page(url: string, props: AnalyticsProps = {}): void {
+    emitEvent({ kind: "page", name: url, props, provider: this.name, ts: new Date().toISOString() });
+  }
+}