Statically link Windows binary to fix missing DLL error

Add -extldflags '-static' to Windows build so libwinpthread-1.dll
and other MinGW runtime DLLs are embedded in the binary.

Author: DeusData

.github/workflows/release.yml

@@ -116,7 +116,7 @@ jobs:
           # Strip leading 'v' — version var should be bare semver (e.g. 0.4.0)
           CLEAN_VERSION="${VERSION#v}"
           CGO_ENABLED=1 CC=gcc go build \
-            -ldflags "-X main.version=$CLEAN_VERSION" \
+            -ldflags "-X main.version=$CLEAN_VERSION -extldflags '-static'" \
             -o codebase-memory-mcp.exe \
             ./cmd/codebase-memory-mcp/