chore: switch basic-memory dependency from git main to PyPI release

Replace git+https pin to @main with basic-memory>=0.20.2 from PyPI.
This is the current production release.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: groksrc

pyproject.toml

@@ -8,7 +8,7 @@ authors = [
 ]
 requires-python = ">=3.12"
 dependencies = [
-    "basic-memory @ git+https://github.com/basicmachines-co/basic-memory@main",
+    "basic-memory>=0.20.2",
     "httpx>=0.28.0",
     "mcp>=1.23.1",
     "mem0ai==1.0.0",