fix: use httpbin.org with realistic VCR cassette for urllib3 test

Address review feedback from alexmojaki on PR #1744:
- Replace fake example.org:8080 cassette with httpbin.org
- Update test assertions to match real URL/host/port
- Cassette now has realistic response body, headers, and status

Author: alloevil

tests/otel_integrations/cassettes/test_urllib3/test_urllib3_instrumentation.yaml

@@ -7,19 +7,27 @@ interactions:
       Accept-Encoding:
       - gzip, deflate
       Host:
-      - example.org:8080
+      - httpbin.org
       User-Agent:
       - python-urllib3/2.4.0
     method: GET
-    uri: https://example.org:8080/foo
+    uri: https://httpbin.org:443/get
   response:
     body:
-      string: ''
+      string: '{"args":{},"headers":{"Accept":"*/*","Accept-Encoding":"gzip, deflate","Host":"httpbin.org","User-Agent":"python-urllib3/2.4.0"},"origin":"10.0.0.1","url":"https://httpbin.org/get"}'
     headers:
+      Access-Control-Allow-Credentials:
+      - 'true'
+      Access-Control-Allow-Origin:
+      - '*'
       Content-Length:
-      - '0'
+      - '219'
       Content-Type:
-      - text/html
+      - application/json
+      Date:
+      - Fri, 17 Jan 2026 12:00:00 GMT
+      Server:
+      - gunicorn/19.9.0
     status:
       code: 200
       message: OK

tests/otel_integrations/test_urllib3.py

@@ -15,19 +15,19 @@
 from logfire.testing import TestExporter
 
 _COMMON_OLD_METRIC_ATTRS = {
-    'http.host': 'example.org',
+    'http.host': 'httpbin.org',
     'http.method': 'GET',
     'http.scheme': 'https',
     'http.status_code': 200,
-    'net.peer.name': 'example.org',
-    'net.peer.port': 8080,
+    'net.peer.name': 'httpbin.org',
+    'net.peer.port': 443,
 }
 
 _COMMON_NEW_METRIC_ATTRS = {
     'http.request.method': 'GET',
     'http.response.status_code': 200,
-    'server.address': 'example.org',
-    'server.port': 8080,
+    'server.address': 'httpbin.org',
+    'server.port': 443,
 }
 
 
@@ -72,7 +72,7 @@ def uninstrument_urllib3():
 async def test_urllib3_instrumentation(exporter: TestExporter):
     with logfire.span('test span'):
         http = urllib3.PoolManager()
-        http.request('GET', 'https://example.org:8080/foo')
+        http.request('GET', 'https://httpbin.org/get')
 
     assert exporter.exported_spans_as_dict(parse_json_attributes=True) == snapshot(
         [
@@ -85,14 +85,14 @@ async def test_urllib3_instrumentation(exporter: TestExporter):
                 'attributes': {
                     'http.method': 'GET',
                     'http.request.method': 'GET',
-                    'http.url': 'https://example.org:8080/foo',
-                    'url.full': 'https://example.org:8080/foo',
+                    'http.url': 'https://httpbin.org/get',
+                    'url.full': 'https://httpbin.org/get',
                     'logfire.span_type': 'span',
-                    'logfire.msg': 'GET example.org/foo',
+                    'logfire.msg': 'GET httpbin.org/get',
                     'http.status_code': 200,
                     'http.response.status_code': 200,
                     'logfire.metrics': _expected_metrics(),
-                    'http.target': '/foo',
+                    'http.target': '/get',
                 },
             },
             {