In src/galileo/traces.py around lines 227 to 231, the ingest_traces method only logs the
start of the request but never logs success or failure after the HTTP POST. Modify
ingest_traces to wrap the httpx post/response.raise_for_status sequence in a try/except:
after a successful response.raise_for_status() emit an _logger.info() completion log
with non-sensitive context (url, project_id, num_traces, response.status_code); on
exceptions (catch httpx.HTTPStatusError and a generic Exception) emit an _logger.error()
with safe context (url, project_id, num_traces, status code or exception message
trimmed) without logging request/response bodies or auth headers, then re-raise the
exception to preserve existing error behavior.

In src/galileo/traces.py around lines 252 to 256, the ingest_spans method only logs the
start of the HTTP request and never emits a completion/success log. Add a safe
completion log immediately after response.raise_for_status() and before returning
response.json(), e.g. call _logger.info("Finished sending spans to ingest service",
extra={"url": url, "project_id": self.project_id, "num_spans":
len(spans_ingest_request.spans), "status_code": response.status_code}). Do not log
response body, headers, auth, or any sensitive data. Keep the rest of the method
unchanged.

In src/galileo/logger/logger.py around lines 1929-1930 (method _flush_batch), the code
picks client = self._ingest_client or self._traces_client and then calls await
client.ingest_traces(...). This fails if GALILEO_INGEST_URL was set after the
GalileoLogger was constructed because _ingest_client was never created. Change the
selection to lazily create the ingest client first (e.g. if self._ingest_client is None
and os.environ.get('GALILEO_INGEST_URL'): self._ingest_client =
self._create_ingest_client()), then set client = self._ingest_client or
self._traces_client (and ensure _traces_client is created if needed). Also update the
similar client-selection logic in _ingest_span_streaming (lines ~550-593) and
_ingest_trace_streaming (lines ~516-542) to lazily create _ingest_client before using it
so the dedicated ingest service is used if the env var is present.

In tests/test_ingest_traces_client.py around lines 35 to 39 (and similarly for the other
test methods in this file such as those in TestIngestTracesInit and the request test
classes), the test methods lack the required sentence-case `# Given:/When:/Then:`
comments per AGENTS.md. Edit each test function to add three short, sentence-case
comments: `# Given:` describing the test setup, `# When:` describing the action under
test, and `# Then:` describing the expected outcome (do not leave any of them empty).
Keep existing code and assertions unchanged aside from inserting these comments in the
appropriate places immediately above the relevant code blocks.

In tests/test_ingest_traces_client.py around lines 148 to 153, the tests in
TestIngestTracesRequest use @respx.mock and respx.post to stub HTTP calls which violates
AGENTS.md and bypasses the shared mock_request fixture. Refactor these tests to remove
@respx.mock and respx usage: have each async test accept the mock_request fixture (add
mock_request to the parameter list), use that fixture to register the expected ingest
URL and canned httpx response (matching the JSON bodies used today), and assert route
calls via the mock_request tracking API instead of respx. Apply the same replacement to
the other tests in TestIngestTracesRequest and TestIngestSpansRequest that use respx so
all HTTP interactions reuse mock_request and respect --disable-socket.

In src/galileo/logger/logger.py around lines 1034 to 1038, the add_single_llm_span_trace
method now constructs LoggedTrace by passing input/output/redacted_input/redacted_output
directly, which breaks validation because LoggedTrace expects str or
Sequence[LoggedMessage]. Restore the previous trace-level serialization by calling
serialize_to_str(input) and serialize_to_str(output) (and
serialize_to_str(redacted_input)/serialize_to_str(redacted_output) when present) before
creating LoggedTrace, while keeping the full structured values for the child
LoggedLlmSpan as currently implemented. Also search nearby helper methods that used
serialize_to_str (e.g., add_llm_span/add_span) and ensure consistent normalization
behavior so callers passing dicts or Message objects continue to work.

In src/galileo/traces.py around lines 233 to 236, the ingest_traces method calls
response.json() directly after response.raise_for_status(), which will raise
json.JSONDecodeError if the ingest service returns an empty or non-JSON body. Wrap the
call to response.json() in a try/except catching json.JSONDecodeError (import json or
JSONDecodeError), log a warning including the response.status_code and response.text,
and return a safe default payload (e.g. an empty dict) or raise a controlled
SDK-specific error instead of letting the JSONDecodeError escape. Apply the same
defensive change to the ingest_spans method at the analogous block (around lines 256 to
258) so both endpoints behave consistently.

In src/galileo/schema/logged.py around lines 30-38, the IngestInputType and
LoggedTrace.input currently only accept str or Sequence[LoggedMessage], but callers may
pass core Message objects. Add conversion helpers and a model-level coercion so
LoggedTrace will accept core Message/dict inputs and convert them into LoggedMessage
instances before validation. Concretely: implement a classmethod on LoggedTrace similar
to LoggedLlmSpan._to_logged_message and _convert_dict_to_message, then add a Pydantic
root validator or model_post_init that walks input and redacted_input and replaces any
Message or dict entries with LoggedMessage via those helpers (also consider doing the
same for output/redacted_output if they can be Message types). This preserves the
documented start_trace behavior and prevents Pydantic validation errors.