Runtime dep @opentelemetry/sdk-trace-base package (#685)

In PR #659 we tried to import the OpenTelemetry types at compile time
and include them in our own package, but that's not how TypeScript's
`import type` turns out to work.

This breaks the app for non-OpenTelemetry users as reported in #684. The
easiest fix we can ship right now is to add the package as a runtime
dependency rather than only a development dependency.

Ideally though, we do not ship additional dependencies for thing not all
our users use, but we can figure that out after this immediate fix.

I had missed this in PR #659, but we've also already included the
`@opentelemetry/api` as a dependency since PR #651. Already doing the
same this change does for the `@opentelemetry/sdk-trace-base` package.

packages/nodejs/.changesets/add-@opentelemetry-sdk-trace-base-runtime-dependency.md

@@ -0,0 +1,6 @@
+---
+bump: "patch"
+type: "fix"
+---
+
+Add `@opentelemetry/sdk-trace-base` package runtime dependency. Our OpenTelemetry SpanProcessor needs this package at runtime, not just at compile time.

packages/nodejs/package.json

@@ -16,6 +16,7 @@
     "@appsignal/core": "^1.1.4",
     "@appsignal/types": "^3.0.0",
     "@opentelemetry/api": "^1.0.4",
+    "@opentelemetry/sdk-trace-base": "^1.2.0",
     "node-addon-api": "^3.1.0",
     "node-gyp": "^9.0.0",
     "require-in-the-middle": "^5.1.0",
@@ -30,8 +31,7 @@
     "@types/semver": "*",
     "nock": "^13.2.2",
     "pg": "*",
-    "redis": "*",
-    "@opentelemetry/sdk-trace-base": "^1.2.0"
+    "redis": "*"
   },
   "scripts": {
     "build": "tsc -p tsconfig.json",