[py][build] Bump dev dependencies and toolchain

[cgoldberg]

💥 What does this PR do?

This PR bumps the Python dev dependencies to the latest versions and updates ruff and the python toolchain version used by bazel.

🔄 Types of changes

• Build

[qodo-code-review]

Review Summary by Qodo

Bump Python dev dependencies and toolchain versions

✨ Enhancement

Walkthroughs

Description

• Bump Python toolchain from 3.14.1 to 3.14.2
• Update ruff from 0.15.1 to 0.15.6
• Update 30+ dev dependencies to latest versions
• Add python-discovery as new dependency for virtualenv

File Changes

1. MODULE.bazel ⚙️ Configuration changes +2/-2

Update Python 3.14 toolchain version

• Update Python 3.14 toolchain version from 3.14.1 to 3.14.2
• Update pip configuration to use Python 3.14.2 in dev requirements

MODULE.bazel

---

2. multitool.lock.json Dependencies +10/-10

Upgrade ruff to 0.15.6 with new hashes

• Bump ruff from 0.15.1 to 0.15.6 across all platforms
• Update SHA256 hashes for all ruff binary releases (Linux ARM64, Linux x86_64, macOS ARM64, macOS
 x86_64, Windows x86_64)

multitool.lock.json

---

3. py/pyproject.toml Dependencies +1/-1

Bump ruff version in pyproject

• Update ruff dependency from 0.15.0 to 0.15.6 in lint dependency group

py/pyproject.toml

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4. py/requirements.txt Dependencies +14/-14

Update 30+ dev dependencies to latest versions

• Update 30+ Python dev dependencies to latest versions
• Notable updates include attrs, cachetools, certifi, chardet, charset-normalizer, filelock,
 importlib_metadata, jaraco.context, nh3, platformdirs, rich, tox, trio, and virtualenv
• Add python-discovery as new dependency

py/requirements.txt

---

5. py/requirements_lock.txt Dependencies +230/-180

Update locked dependency versions and hashes

• Update locked versions and SHA256 hashes for all 30+ dev dependencies
• Add python-discovery 1.2.0 as new locked dependency with hashes
• Add tomli-w 1.2.0 as new transitive dependency for tox
• Update all package hashes to match new versions

py/requirements_lock.txt

---

[qodo-code-review]

Code Review by Qodo

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