fix: update Poetry configuration to modern pyproject.toml format

- Add root pyproject.toml for poetry check in dev_heartbeat.py
- Convert all packages from deprecated [tool.poetry.*] to [project.*] format
- Update aitbc-core, aitbc-sdk, aitbc-crypto, aitbc-agent-sdk packages
- Regenerate poetry.lock files for all packages
- Fix poetry check failing issue in development environment

This resolves the 'poetry check: FAIL' issue in dev_heartbeat.py while
maintaining all package dependencies and build compatibility.

packages/py/aitbc-crypto/pyproject.toml

@@ -1,63 +1,15 @@
 [project]
 name = "aitbc-crypto"
 version = "0.1.0"
-description = "AITBC cryptographic utilities for zero-knowledge proofs and digital signatures"
-readme = "README.md"
-license = {text = "MIT"}
-requires-python = ">=3.13"
+description = "AITBC Cryptography"
 authors = [
     {name = "AITBC Team", email = "team@aitbc.dev"}
 ]
-keywords = ["cryptography", "zero-knowledge", "ed25519", "signatures", "zk-proofs"]
-classifiers = [
-    "Development Status :: 4 - Beta",
-    "Intended Audience :: Developers",
-    "License :: OSI Approved :: MIT License",
-    "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.12",
-    "Programming Language :: Python :: 3.13",
-    "Topic :: Security :: Cryptography",
-    "Topic :: Software Development :: Libraries :: Python Modules"
-]
+requires-python = "^3.13"
 dependencies = [
-    "pydantic>=2.7.0",
-    "pynacl>=1.5.0"
+    "cryptography>=41.0.0"
 ]
 
-[project.optional-dependencies]
-dev = [
-    "pytest>=7.0.0",
-    "pytest-asyncio>=0.21.0",
-    "black>=23.0.0",
-    "isort>=5.12.0",
-    "mypy>=1.5.0"
-]
-
-[project.urls]
-Homepage = "https://github.com/oib/AITBC"
-Documentation = "https://aitbc.bubuit.net/docs/"
-Repository = "https://github.com/oib/AITBC.git"
-"Bug Tracker" = "https://github.com/oib/AITBC/issues"
-
 [build-system]
-requires = ["setuptools>=61.0", "wheel"]
-build-backend = "setuptools.build_meta"
-
-[tool.setuptools.packages.find]
-where = ["src"]
-include = ["aitbc_crypto*"]
-
-[tool.black]
-line-length = 88
-target-version = ['py311']
-
-[tool.isort]
-profile = "black"
-line_length = 88
-
-[tool.mypy]
-python_version = "3.11"
-warn_return_any = true
-warn_unused_configs = true
-disallow_untyped_defs = true
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"