build(test-flask): Migrate to uv and pyproject.toml

[ericapisani]

Summary

• Replace pip/requirements.txt with uv/pyproject.toml for dependency management
• Update run.sh to use uv run instead of manual venv creation and pip install
• Remove legacy requirements.txt

Refs PY-2453

Test plan

• Verify pyproject.toml includes all dependencies from the original requirements.txt
• Verify run.sh uses uv run
• Verify requirements.txt is removed

🤖 Generated with Claude Code

[linear-code]

PY-2453

[sentry]

Bug: The script installs uv but doesn't update the current shell's $PATH, causing the subsequent uv run command to fail with 'command not found' in clean environments.
_{Severity: HIGH}

Suggested Fix

After the curl | sh installation line, add export PATH="$HOME/.local/bin:$PATH" to update the current shell's PATH variable. This ensures the uv command is found and executed correctly within the same script session. Alternatively, source the profile file, e.g., source "$HOME/.cargo/env", if the installer provides a consistent environment file.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location: test-flask/run.sh#L4-L8

Potential issue: When `uv` is not pre-installed, the script attempts to install it using
`curl -LsSf https://astral.sh/uv/install.sh | sh`. However, this installer only modifies
shell profile files (e.g., `.bashrc`) and does not update the `$PATH` of the current,
non-interactive shell session. As a result, the immediately following `uv run` command
on line 8 fails because the `uv` executable cannot be found. Since `set -euo pipefail`
is active, the script exits immediately upon this failure, preventing the test from
running in any environment without a pre-existing `uv` installation, such as a clean CI
runner.

_{Did we get this right? 👍 / 👎 to inform future reviews.}