infra: allow rerun make install without prompt (#2979)

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# Rationale for this change
This PR lets `uv` manage the virtual env. uv will only setup a new venv
if it does not exist and sync dep only when necessary.
This should make the entire `make install` process a lot faster and
easier to work with

### Context
I noticed running `make install` when a `.venv` already existed would
show an interactive prompt:
```
➜  make install
uv is already installed.
uv venv 
Using CPython 3.12.11 interpreter at: /Users/kevinliu/.pyenv/versions/3.12.11/bin/python3
Creating virtual environment at: .venv
? A virtual environment already exists at `.venv`. Do you want to replace it? [y/n] › yes

hint: Use the `--clear` flag or set `UV_VENV_CLEAR=1` to skip this prompt
```

We dont need this prompt. And more crucially, claude keeps on getting
stuck on this prompt 😞

## Are these changes tested?
Yes running `make install` repeatedly 

## Are there any user-facing changes?

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Author: kevinjqliu

.github/workflows/python-ci.yml

@@ -62,7 +62,7 @@ jobs:
     - name: Install system dependencies
       run: sudo apt-get update && sudo apt-get install -y libkrb5-dev # for kerberos
     - name: Install
-      run: make install-dependencies
+      run: make install
     - name: Run linters
       run: make lint
     - name: Run unit tests with coverage

Makefile

@@ -66,16 +66,17 @@ install-uv: ## Ensure uv is installed
 		echo "uv is already installed."; \
 	fi
 
-setup-venv: ## Create virtual environment
-	uv venv $(PYTHON_ARG)
-
-install-dependencies: setup-venv ## Install all dependencies including extras
-	uv sync $(PYTHON_ARG) --all-extras --reinstall
-
-install-hooks: ## Install pre-commit hooks (skipped outside git repo, e.g. release tarballs)
-	@if [ -d .git ]; then uv run $(PYTHON_ARG) prek install; fi
-
-install: install-uv install-dependencies install-hooks ## Install uv, dependencies, and pre-commit hooks
+install: install-uv ## Install uv, dependencies, and pre-commit hooks
+	uv sync $(PYTHON_ARG) --all-extras
+	@# Reinstall pyiceberg if Cython extensions (.so) are missing after `make clean` (see #2869)
+	@if ! find pyiceberg -name "*.so" 2>/dev/null | grep -q .; then \
+		echo "Cython extensions not found, reinstalling pyiceberg..."; \
+		uv sync $(PYTHON_ARG) --all-extras --reinstall-package pyiceberg; \
+	fi
+	@# Install pre-commit hooks (skipped outside git repo, e.g. release tarballs)
+	@if [ -d .git ]; then \
+		uv run $(PYTHON_ARG) prek install; \
+	fi
 
 # ===============
 # Code Validation