Fetch logs search metadata

What does this MR do and why?

• Add fetchLogsSearchMetadata to ObservabilityClient (Note the metadata API is still WIP, hence I'm mocking the actual network request here, but should be able to remove the mocks in the next few days. I just want to get started having the changes merged and reviewed while backend work is in progress)
• Fetch logs search metadata from LogsList. This will be then hooked up and passed down to other components ( once Add Logs search suggestions from metadata (!151993 - merged) and Create LogsVolume chart component (!151990 - merged) are merged) in a separate MR.

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

No visual changes

How to set up and validate locally

• Prerequisites: be logged in and running GDK with Ultimate license
• Enable :observability_logs feature flag

Apply patch to load mocks ( copy the patch content below and run in your terminal: pbpaste | git apply )

diff --git a/app/assets/javascripts/observability/client.js b/app/assets/javascripts/observability/client.js
index 5b98281b5e36..2af555072518 100644
--- a/app/assets/javascripts/observability/client.js
+++ b/app/assets/javascripts/observability/client.js
@@ -1,3 +1,4 @@
+/* eslint-disable @gitlab/require-i18n-strings */
 import { isValidDate } from '~/lib/utils/datetime_utility';
 import * as Sentry from '~/sentry/sentry_browser_wrapper';
 import axios from '~/lib/utils/axios_utils';
@@ -15,15 +16,17 @@ function reportErrorAndThrow(e) {
  * Provisioning API
  *
  * ***** */
+function mockReturnDataWithDelay(data) {
+  return new Promise((resolve) => {
+    setTimeout(() => resolve(data), 1000);
+  });
+}

 // Provisioning API spec: https://gitlab.com/gitlab-org/opstrace/opstrace/-/blob/main/provisioning-api/pkg/provisioningapi/routes.go#L59
 async function enableObservability(provisioningUrl) {
   try {
-    // Note: axios.put(url, undefined, {withCredentials: true}) does not send cookies properly, so need to use the API below for the correct behaviour
-    return await axios(provisioningUrl, {
-      method: 'put',
-      withCredentials: true,
-    });
+    console.log('[DEBUG] Enabling Observability');
+    return mockReturnDataWithDelay();
   } catch (e) {
     return reportErrorAndThrow(e);
   }
@@ -32,19 +35,14 @@ async function enableObservability(provisioningUrl) {
 // Provisioning API spec: https://gitlab.com/gitlab-org/opstrace/opstrace/-/blob/main/provisioning-api/pkg/provisioningapi/routes.go#L37
 async function isObservabilityEnabled(provisioningUrl) {
   try {
-    const { data } = await axios.get(provisioningUrl, { withCredentials: true });
-    if (data && data.status) {
-      // we currently ignore the 'status' payload and just check if the request was successful
-      // We might improve this as part of https://gitlab.com/gitlab-org/opstrace/opstrace/-/issues/2315
-      return true;
-    }
+    console.log('[DEBUG] Checking Observability provisioning');
+    return mockReturnDataWithDelay(true);
   } catch (e) {
     if (e.response.status === 404) {
       return false;
     }
     return reportErrorAndThrow(e);
   }
-  return reportErrorAndThrow(new Error('Failed to check provisioning')); // eslint-disable-line @gitlab/require-i18n-strings
 }

 /** ****
@@ -597,17 +595,49 @@ export async function fetchLogs(logsSearchUrl, { pageToken, pageSize, filters =
     if (pageSize) {
       params.append('page_size', pageSize);
     }
-    const { data } = await axios.get(logsSearchUrl, {
-      withCredentials: true,
-      params,
+
+    console.log(`[DEBUG] Fetching logs with params: ${params.toString()}`);
+
+    const data = [
+      {
+        timestamp: '2024-02-19T16:10:15.4433398Z',
+        trace_id: ']?4ft^T\u0011\ufffd\u0013\ufffd6\ufffdbj\ufffd',
+        span_id: "'\u0013\ufffd\ufffd_\ufffd\ufffd\ufffd",
+        trace_flags: 1,
+        severity_text: 'Information',
+        severity_number: 9,
+        service_name: 'cartservice',
+        body:
+          'AddItemAsync called with userId={userId}, productId={productId}, quantity={quantity} AddItemAsync called with userId={userId}, productId={productId}, quantity={quantity} AddItemAsync called with userId={userId}, productId={productId}, quantity={quantity} AddItemAsync called with userId={userId}, productId={productId}, quantity={quantity} AddItemAsync called with userId={userId}, productId={productId}, quantity={quantity} AddItemAsync called with userId={userId}, productId={productId}, quantity={quantity} ',
+        resource_attributes: {
+          'container.id': 'ae165f3300bf7da7cc83b360e955683f31f959268241895747f23ad165014005',
+          'k8s.deployment.name': 'otel-demo-cartservice',
+          'k8s.namespace.name': 'otel-demo-app',
+          'k8s.node.name': 'opstrace-worker2',
+          'k8s.pod.ip': '192.168.62.215',
+          'k8s.pod.name': 'otel-demo-cartservice-6dcc867f5f-pcm68',
+          'k8s.pod.start_time': '2024-02-12T13:32:12Z',
+          'k8s.pod.uid': 'bb0991d5-d2f9-486d-aed6-fb431da28bcb',
+          'service.name': 'cartservice',
+          'service.namespace': 'opentelemetry-demo',
+          'telemetry.sdk.language': 'dotnet',
+          'telemetry.sdk.name': 'opentelemetry',
+          'telemetry.sdk.version': '1.6.0',
+        },
+        log_attributes: {
+          productId: 'LS4PSXUNUM',
+          quantity: '5',
+          userId: '5e22f0f6-cf41-11ee-a97f-768346730ebf',
+        },
+      },
+    ];
+
+    return mockReturnDataWithDelay({
+      logs: [...data, ...data, ...data, ...data, ...data, ...data, ...data].map((l) => ({
+        ...l,
+        fingerprint: crypto.randomUUID(),
+      })),
     });
-    if (!Array.isArray(data.results)) {
-      throw new Error('logs are missing/invalid in the response'); // eslint-disable-line @gitlab/require-i18n-strings
-    }
-    return {
-      logs: data.results,
-      nextPageToken: data.next_page_token,
-    };
   } catch (e) {
     return reportErrorAndThrow(e);
   }
diff --git a/app/assets/javascripts/observability/components/observability_container.vue b/app/assets/javascripts/observability/components/observability_container.vue
index d0902505ca73..f6cbf7ee771f 100644
--- a/app/assets/javascripts/observability/components/observability_container.vue
+++ b/app/assets/javascripts/observability/components/observability_container.vue
@@ -27,12 +27,12 @@ export default {

     // TODO: Improve local GDK dev experience with tracing https://gitlab.com/gitlab-org/opstrace/opstrace/-/issues/2308
     // Uncomment the lines below to to test this locally
-    // setTimeout(() => {
-    //   this.messageHandler({
-    //     data: { type: 'AUTH_COMPLETION', status: 'success' },
-    //     origin: new URL(this.apiConfig.oauthUrl).origin,
-    //   });
-    // }, 2000);
+    setTimeout(() => {
+      this.messageHandler({
+        data: { type: 'AUTH_COMPLETION', status: 'success' },
+        origin: new URL(this.apiConfig.oauthUrl).origin,
+      });
+    }, 2000);
   },
   destroyed() {
     window.removeEventListener('message', this.messageHandler);

• Go to https://local.gitlab.com:3443/flightjs/Flight/-/logs