feat(runtime): implement single-article consolidation runtime and modularize codebase

tests/runtime/unit/test_langfuse_tracer.py

@@ -0,0 +1,30 @@
+"""Unit tests for Langfuse tracer and offline queue covering OBS-001 to OBS-011."""
+
+from pathlib import Path
+
+from src.runtime.core.config import load_runtime_config
+from src.runtime.observability.langfuse_tracer import LangfuseRuntimeTracer
+from src.runtime.storage.sqlite_store import SQLiteStore
+
+
+def test_tracer_offline_queues_to_sqlite(tmp_path: Path):
+    db_file = tmp_path / "obs.db"
+    store = SQLiteStore(db_file)
+    cfg = load_runtime_config("runtime_config.local.json")
+
+    tracer = LangfuseRuntimeTracer(cfg, store)
+    # Without keys configured, record_trace must safely queue to SQLite pending_telemetry
+    success = tracer.record_trace(
+        trace_id="tr_001",
+        fingerprint="a" * 64,
+        source_url="https://example.com",
+        status="completed_text",
+        spans_data={"validation": {"status": "SUCCESS"}},
+        generations=[],
+        metrics={"cost_usd": 0.001},
+    )
+    assert success is False  # Queued offline
+
+    unflushed = store.get_unflushed_telemetry()
+    assert len(unflushed) == 1
+    assert unflushed[0]["fingerprint"] == "a" * 64