feat: implement DCOS source tree, tests, and build configuration

Complete implementation of the DCOS package including:
- 40+ Python source files across agents, communication, core, learning, memory, protocols, utils
- pyproject.toml build configuration
- 102 unit tests across all subsystems
- Fixed flake.nix (Python 3.12, proper dependencies, pyproject build)
- Fixed .woodpecker.yml (correct paths, removed silent-fail flags)
- Added .gitignore
- Cleared stale pytest cache

tests/test_core/test_allocator.py

@@ -0,0 +1,37 @@
+"""
+Tests for ResourceAllocator.
+"""
+
+import pytest
+from dcos.core.allocator import ResourceAllocator
+
+
+class TestResourceAllocator:
+    def test_allocate(self):
+        alloc = ResourceAllocator()
+        assert alloc.allocate("agent_1", cpu=10.0, memory=256.0) is True
+
+    def test_allocate_over_limit(self):
+        alloc = ResourceAllocator()
+        # Total is 100 CPU, 1024 memory
+        assert alloc.allocate("agent_1", cpu=60.0, memory=512.0) is True
+        assert alloc.allocate("agent_2", cpu=50.0, memory=512.0) is False  # over CPU
+
+    def test_release(self):
+        alloc = ResourceAllocator()
+        alloc.allocate("agent_1", cpu=10.0, memory=128.0)
+        assert alloc.release("agent_1") is True
+        assert alloc.release("nonexistent") is False
+
+    def test_utilization(self):
+        alloc = ResourceAllocator()
+        alloc.allocate("agent_1", cpu=25.0, memory=256.0)
+        util = alloc.utilization()
+        assert util["cpu"] == 0.25
+        assert util["memory"] == 0.25
+
+    def test_get_allocation(self):
+        alloc = ResourceAllocator()
+        alloc.allocate("agent_1", cpu=10.0, memory=128.0)
+        alloc_info = alloc.get_allocation("agent_1")
+        assert alloc_info["cpu"] == 10.0