feat: deep-agent canvas, live observability, and multi-environment tooling

Self-hosted platform for building, testing, and shipping LangChain/LangGraph agents. Deep-agent sub-agents on the canvas, a live tracing/observability timeline, auto-provisioned built-in tools with import/export, per-environment tool variables, streamed evaluations, and per-user auth token forwarding.

apps/api/tests/test_pricing.py

@@ -0,0 +1,25 @@
+"""Admin pricing overrides overlay the built-in defaults."""
+
+from __future__ import annotations
+
+from forge.tracing.pricing import load_overrides, merged_prices, price, set_override
+
+
+def test_default_pricing_applies():
+    # gpt-4o-mini default is (0.15, 0.6) per 1M
+    cost = price("gpt-4o-mini", 1_000_000, 0)
+    assert abs(cost - 0.15) < 1e-9
+
+
+def test_override_takes_precedence_and_matches_bare_name():
+    set_override("gpt-4o-mini", 1.0, 2.0)
+    try:
+        assert abs(price("gpt-4o-mini", 1_000_000, 0) - 1.0) < 1e-9
+        assert abs(price("openai:gpt-4o-mini", 0, 1_000_000) - 2.0) < 1e-9  # provider-prefixed resolves bare
+        assert merged_prices()["gpt-4o-mini"] == (1.0, 2.0)
+    finally:
+        load_overrides({})  # reset so other tests see defaults
+
+
+def test_unknown_model_prices_zero():
+    assert price("totally-unknown-model", 1000, 1000) == 0.0