Context building slog sender (#10300)

closes: #10269

## Description
Adds a slog sender which will build various contexts along the way and report them along with the slogs for better logs querying and identification

### Security Considerations
None

### Scaling Considerations
This uses a json file storage

### Documentation Considerations
This is a new slogger which can be opted into

### Testing Considerations
This will be deployed on testnets (already deployed on one of the testnets and log link is added in a comment below)

### Upgrade Considerations
This can be configured on existing deployments by bumping the telemetry package

packages/telemetry/package.json

@@ -29,9 +29,12 @@
     "@endo/marshal": "^1.6.1",
     "@endo/stream": "^1.2.7",
     "@opentelemetry/api": "~1.3.0",
+    "@opentelemetry/api-logs": "0.53.0",
     "@opentelemetry/exporter-prometheus": "~0.35.0",
+    "@opentelemetry/exporter-logs-otlp-http": "0.53.0",
     "@opentelemetry/exporter-trace-otlp-http": "~0.35.0",
     "@opentelemetry/resources": "~1.9.0",
+    "@opentelemetry/sdk-logs": "0.53.0",
     "@opentelemetry/sdk-metrics": "~1.9.0",
     "@opentelemetry/sdk-trace-base": "~1.9.0",
     "@opentelemetry/semantic-conventions": "~1.27.0",

packages/telemetry/src/context-aware-slog-file.js

@@ -0,0 +1,42 @@
+/* eslint-env node */
+
+import { makeFsStreamWriter } from '@agoric/internal/src/node/fs-stream.js';
+import { makeContextualSlogProcessor } from './context-aware-slog.js';
+import { serializeSlogObj } from './serialize-slog-obj.js';
+
+/**
+ * @param {import('./index.js').MakeSlogSenderOptions} options
+ */
+export const makeSlogSender = async options => {
+  const { CHAIN_ID, CONTEXTUAL_SLOGFILE } = options.env || {};
+  if (!CONTEXTUAL_SLOGFILE)
+    return console.warn(
+      'Ignoring invocation of slogger "context-aware-slog-file" without the presence of "CONTEXTUAL_SLOGFILE"',
+    );
+
+  const stream = await makeFsStreamWriter(CONTEXTUAL_SLOGFILE);
+
+  if (!stream)
+    return console.error(
+      `Couldn't create a write stream on file "${CONTEXTUAL_SLOGFILE}"`,
+    );
+
+  const contextualSlogProcessor = makeContextualSlogProcessor({
+    'chain-id': CHAIN_ID,
+  });
+
+  /**
+   * @param {import('./context-aware-slog.js').Slog} slog
+   */
+  const slogSender = slog => {
+    const contextualizedSlog = contextualSlogProcessor(slog);
+
+    // eslint-disable-next-line prefer-template
+    stream.write(serializeSlogObj(contextualizedSlog) + '\n').catch(() => {});
+  };
+
+  return Object.assign(slogSender, {
+    forceFlush: () => stream.flush(),
+    shutdown: () => stream.close(),
+  });
+};