refactor: update dependency versions and streamline backend installation commands (#3939)

* Update Makefile to streamline backend dependency installation commands

* Update dependency versions in pyproject.toml for weaviate-client, httpx, and others

* Update dependency versions in pyproject.toml for better compatibility and stability

* new lock

* refactor: streamline backend dependency installation commands

* update examples formatting

src/backend/base/pyproject.toml

@@ -166,7 +166,7 @@ readme = "README.md"
 
 dependencies = [
     "fastapi>=0.111.0",
-    "httpx",
+    "httpx>=0.27",
     "uvicorn>=0.30.0",
     "gunicorn>=22.0.0",
     "langchain~=0.2.0",
@@ -178,7 +178,6 @@ dependencies = [
     "langchain-experimental>=0.0.61",
     "pydantic>=2.7.0",
     "pydantic-settings>=2.2.0",
-    "websockets",
     "typer>=0.12.0",
     "cachetools>=5.3.1",
     "platformdirs>=4.2.0",
@@ -224,22 +223,22 @@ dependencies = [
 # Optional dependencies for uv
 [project.optional-dependencies]
 deploy = [
-    "celery",
-    "redis",
-    "flower"
+    "celery>=5.3.1",
+    "redis>=4.6.0",
+    "flower>=1.0.0"
 ]
 local = [
-    "llama-cpp-python",
-    "sentence-transformers",
-    "ctransformers"
+    "llama-cpp-python>=0.2.0",
+    "sentence-transformers>=2.0.0",
+    "ctransformers>=0.2"
 ]
 all = [
-    "celery",
-    "redis",
-    "flower",
-    "llama-cpp-python",
-    "sentence-transformers",
-    "ctransformers"
+    "celery>=5.3.1",
+    "redis>=4.6.0",
+    "flower>=1.0.0",
+    "llama-cpp-python>=0.2.0",
+    "sentence-transformers>=2.0.0",
+    "ctransformers>=0.2"
 ]
 
 # Development dependencies
@@ -248,7 +247,7 @@ dev = [
     "ipykernel>=6.29.0",
     "mypy>=1.11.0",
     "ruff>=0.4.5",
-    "httpx",
+    "httpx>=0.27",
     "pytest>=8.2.0",
     "types-requests>=2.32.0",
     "requests>=2.32.0",