feat(argv): Support span streaming (#6227)

### Description
Reintroducing the argv integration port from
#6147. Work on full
support for array attributes in the product is still ongoing, but at
least the trace will now load (the attribute won't be displayed), so
we're not breaking anything with this change.

#### Issues
- Closes #5998
- Closes
https://linear.app/getsentry/issue/PY-2300/migrate-argv-to-span-first

#### Reminders
- Please add tests to validate your changes, and lint your code using
`tox -e linters`.
- Add GH Issue ID _&_ Linear ID (if applicable)
- PR title should use [conventional
commit](https://develop.sentry.dev/engineering-practices/commit-messages/#type)
style (`feat:`, `fix:`, `ref:`, `meta:`)
- For external contributors:
[CONTRIBUTING.md](https://github.com/getsentry/sentry-python/blob/master/CONTRIBUTING.md),
[Sentry SDK development docs](https://develop.sentry.dev/sdk/), [Discord
community](https://discord.gg/Ww9hbqr)

Author: sentrivana

sentry_sdk/traces.py

@@ -7,6 +7,7 @@
 sentry_sdk.init(_experiments={"trace_lifecycle": "stream"}).
 """
 
+import sys
 import uuid
 import warnings
 from datetime import datetime, timedelta, timezone
@@ -306,6 +307,8 @@ def __init__(
         self._start_profile()
         self._set_profile_id(get_profiler_id())
 
+        self._set_segment_attributes()
+
         self._start()
 
     def __repr__(self) -> str:
@@ -564,6 +567,12 @@ def _start_profile(self) -> None:
 
         self._continuous_profile = try_profile_lifecycle_trace_start()
 
+    def _set_segment_attributes(self) -> None:
+        if not self._is_segment():
+            return
+
+        self.set_attribute("process.command_args", sys.argv)
+
 
 class NoOpStreamedSpan(StreamedSpan):
     __slots__ = (

tests/tracing/test_span_streaming.py

@@ -1510,6 +1510,7 @@ def test_default_attributes(sentry_init, capture_envelopes):
     assert item.payload.json["items"][0]["attributes"] == {
         "thread.id": {"value": mock.ANY, "type": "string"},
         "thread.name": {"value": "MainThread", "type": "string"},
+        "process.command_args": {"value": mock.ANY, "type": "array"},
         "sentry.segment.id": {"value": mock.ANY, "type": "string"},
         "sentry.segment.name": {"value": "test", "type": "string"},
         "sentry.sdk.name": {"value": "sentry.python", "type": "string"},