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.

.github/dependabot.yml

@@ -0,0 +1,30 @@
+version: 2
+updates:
+  # Backend Python dependencies (PEP 621 pyproject.toml).
+  - package-ecosystem: "pip"
+    directory: "/apps/api"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 5
+    groups:
+      python:
+        patterns: ["*"]
+
+  # Frontend / workspace JS dependencies (pnpm workspace at the repo root).
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 5
+    groups:
+      javascript:
+        patterns: ["*"]
+
+  # GitHub Actions used by the workflows.
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    groups:
+      actions:
+        patterns: ["*"]