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_agent_tool_dedup.py

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+"""An agent binds each tool NAME to the model at most once.
+
+Two layers protect the model call: `resolve_tool_ids` de-dups by id (a tool that lives in several
+tool sets is one record → sent once), and `_dedup_tools_by_name` is the final guard against a
+name collision from distinct records/sources (tool names aren't unique per project, and the list
+mixes tools + knowledge + MCP + components). Providers reject a duplicate function name.
+"""
+
+from __future__ import annotations
+
+from types import SimpleNamespace
+
+from forge.nodes.agent_node import _dedup_tools_by_name
+
+
+def test_dedup_keeps_first_occurrence_by_name():
+    first = SimpleNamespace(name="get_orders")
+    dup = SimpleNamespace(name="get_orders")  # different object, same name (two Tool records)
+    other = SimpleNamespace(name="create_order")
+    out = _dedup_tools_by_name([first, other, dup])
+    assert [t.name for t in out] == ["get_orders", "create_order"]
+    assert out[0] is first  # the first occurrence wins
+
+
+def test_dedup_never_drops_unnamed_tools():
+    x = SimpleNamespace()  # no .name to key on
+    y = SimpleNamespace()
+    named = SimpleNamespace(name="t")
+    out = _dedup_tools_by_name([x, named, y])
+    assert len(out) == 3