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

[ericapisani]

Summary

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

Refs PY-2456

Test plan

• Verify pyproject.toml includes all dependencies from the original requirements.txt
• Verify shell scripts use uv run
• Verify requirements.txt is removed

🤖 Generated with Claude Code

[linear-code]

PY-2456

[sentry]

Bug: The Python version in .python-version (3.10) conflicts with the requires-python constraint (>=3.12) in pyproject.toml, causing uv run to fail.
_{Severity: HIGH}

Suggested Fix

Align the Python versions. Either update the .python-version file to a version compatible with the >=3.12 constraint, or adjust the requires-python setting in pyproject.toml to ">=3.10" if the code supports it.

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-grpc/pyproject.toml#L4

Potential issue: The `test-grpc` directory contains a `.python-version` file that
specifies Python version `3.10`. However, the `pyproject.toml` file introduced in this
pull request requires Python version `>=3.12`. When scripts like `run-server.sh` are
executed using `uv run`, `uv` detects this version conflict and exits with an error,
preventing the scripts from running.

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

[sentry]

Bug: The compile-service.sh script was not updated to use uv and fails because it can no longer install its dependencies.
_{Severity: HIGH}

Suggested Fix

Update compile-service.sh to use uv run for executing the protobuf compiler, similar to how run-server.sh was updated. This ensures the necessary dependencies, like grpcio-tools, are available during execution.

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-grpc/run-server.sh#L1-L8

Potential issue: The `compile-service.sh` script was not updated to use `uv` for
dependency management. It still attempts to create a virtual environment and run `python
-m grpc_tools.protoc`. Since the `requirements.txt` file was removed and dependencies
are now managed by `uv` via `pyproject.toml`, the virtual environment created by the
script is empty. This causes the script to fail with a `No module named
grpc_tools.protoc` error, rendering it unusable.

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