fix: resolve CI issues and consolidate workflows

- Fix version dependencies: update backend packages to depend on leann-core==0.1.1
- Remove duplicate ci.yml workflow (keeping build-and-publish.yml as main CI)
- Update release-manual.yml to reference correct CI workflow name

This fixes the dependency resolution error and eliminates duplicate builds.

packages/leann-backend-diskann/pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "scikit_build_core.build"
 [project]
 name = "leann-backend-diskann"
 version = "0.1.1"
-dependencies = ["leann-core==0.1.0", "numpy"]
+dependencies = ["leann-core==0.1.1", "numpy"]
 
 [tool.scikit-build]
 # Key: simplified CMake path

packages/leann-backend-hnsw/pyproject.toml

@@ -9,7 +9,7 @@ name = "leann-backend-hnsw"
 version = "0.1.1"
 description = "Custom-built HNSW (Faiss) backend for the Leann toolkit."
 dependencies = [
-    "leann-core==0.1.0", 
+    "leann-core==0.1.1", 
     "numpy",
     "pyzmq>=23.0.0",
     "msgpack>=1.0.0",