fix: replace deprecated asyncio event loop patterns for Python 3.14 compatibility

[mangelajo]

Summary

Built on top of #775 (Python 3.14 upgrade). After the SNMP driver was fixed in 769be00, we audited the entire codebase for the same deprecated asyncio event loop patterns. Found three more locations that need fixing.

Audit findings

We searched all Python packages for these deprecated patterns:

• asyncio.get_event_loop() — deprecated since 3.10, emits DeprecationWarning in 3.12/3.13, RuntimeError in 3.14 (when no running loop)
• asyncio.new_event_loop() + set_event_loop() + run_until_complete() — set_event_loop() is deprecated since 3.10 and becomes a no-op in 3.14
• asyncio.Event() created outside async context — requires get_running_loop() in 3.14, RuntimeError otherwise
• asyncio.ensure_future() — deprecated since 3.10

Compatibility matrix

Pattern	3.12	3.13	3.14
get_event_loop() (no running loop)	DeprecationWarning	DeprecationWarning	RuntimeError
set_event_loop()	DeprecationWarning	DeprecationWarning	No-op / broken
asyncio.Event() (no running loop)	DeprecationWarning	DeprecationWarning	RuntimeError
ensure_future()	DeprecationWarning	DeprecationWarning	DeprecationWarning
get_running_loop()	OK	OK	OK
asyncio.run()	OK	OK	OK
asyncio.create_task()	OK	OK	OK

Changes

1. TFTP driver — HIGH RISK (will crash on 3.14)

jumpstarter-driver-tftp/jumpstarter_driver_tftp/driver.py

The _start_server() method used the exact same anti-pattern that was fixed in the SNMP driver:

# Before (broken on 3.14):
def _start_server(self):
    self._loop = asyncio.new_event_loop()
    asyncio.set_event_loop(self._loop)          # deprecated, no-op in 3.14
    self.server = TftpServer(...)               # creates asyncio.Event() — RuntimeError in 3.14!
    self._loop.run_until_complete(...)

Three problems:

1. set_event_loop() is deprecated and becomes ineffective in 3.14
2. TftpServer.__init__ creates asyncio.Event() objects (server.py lines 52, 61) before the loop is running — RuntimeError in 3.14
3. Manual run_until_complete() + shutdown_asyncgens() + close() lifecycle

Fix: Replace with asyncio.run() and move TftpServer construction into an async method so asyncio.Event() objects are created with a running loop:

# After:
def _start_server(self):
    asyncio.run(self._run_server_lifecycle())

async def _run_server_lifecycle(self):
    self._loop = asyncio.get_running_loop()
    self.server = TftpServer(...)               # Event() now has a running loop
    self._loop_ready.set()
    await self._run_server()

2. Shell driver — MEDIUM RISK (deprecation warnings on 3.12/3.13)

jumpstarter-driver-shell/jumpstarter_driver_shell/driver.py lines 201, 208

# Before:
start_time = asyncio.get_event_loop().time()
# After:
start_time = asyncio.get_running_loop().time()

Called from async def _run_inline_shell_script() so a loop IS running and it works today, but get_event_loop() emits DeprecationWarning in 3.12+. Trivial swap to the correct API.

3. mitmproxy example — LOW RISK (deprecated, still works)

jumpstarter-driver-mitmproxy/examples/addons/data_stream_websocket.py lines 134, 172

Replaced asyncio.ensure_future() (deprecated since 3.10) with asyncio.create_task().

What was already clean

The rest of the codebase (including core jumpstarter, network driver, qemu driver, pyserial driver, etc.) already uses the correct modern APIs (get_running_loop(), asyncio.run(), create_task()). The SNMP driver was fixed in 769be00.

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📥 Commits

Reviewing files that changed from the base of the PR and between d46e91a and 798cdd6.

⛔ Files ignored due to path filters (1)

• python/uv.lock is excluded by !**/*.lock

📒 Files selected for processing (74)

• .github/workflows/documentation.yaml
• .github/workflows/e2e.yaml
• .github/workflows/lint.yaml
• .github/workflows/python-tests.yaml
• .py-version
• python/__templates__/driver/pyproject.toml.tmpl
• python/examples/android-emulator/pyproject.toml
• python/examples/automotive/pyproject.toml
• python/examples/soc-pytest/pyproject.toml
• python/examples/xcp-ecu/pyproject.toml
• python/packages/hatch-pin-jumpstarter/pyproject.toml
• python/packages/jumpstarter-all/pyproject.toml
• python/packages/jumpstarter-cli-admin/pyproject.toml
• python/packages/jumpstarter-cli-common/pyproject.toml
• python/packages/jumpstarter-cli-driver/pyproject.toml
• python/packages/jumpstarter-cli/pyproject.toml
• python/packages/jumpstarter-driver-adb/pyproject.toml
• python/packages/jumpstarter-driver-androidemulator/pyproject.toml
• python/packages/jumpstarter-driver-ble/pyproject.toml
• python/packages/jumpstarter-driver-can/pyproject.toml
• python/packages/jumpstarter-driver-composite/pyproject.toml
• python/packages/jumpstarter-driver-corellium/pyproject.toml
• python/packages/jumpstarter-driver-doip/pyproject.toml
• python/packages/jumpstarter-driver-dut-network/pyproject.toml
• python/packages/jumpstarter-driver-dutlink/pyproject.toml
• python/packages/jumpstarter-driver-energenie/pyproject.toml
• python/packages/jumpstarter-driver-esp32/pyproject.toml
• python/packages/jumpstarter-driver-flashers/pyproject.toml
• python/packages/jumpstarter-driver-gpiod/pyproject.toml
• python/packages/jumpstarter-driver-http-power/pyproject.toml
• python/packages/jumpstarter-driver-http/pyproject.toml
• python/packages/jumpstarter-driver-iscsi/pyproject.toml
• python/packages/jumpstarter-driver-mitmproxy/examples/addons/data_stream_websocket.py
• python/packages/jumpstarter-driver-mitmproxy/pyproject.toml
• python/packages/jumpstarter-driver-network/pyproject.toml
• python/packages/jumpstarter-driver-noyito-relay/pyproject.toml
• python/packages/jumpstarter-driver-opendal/pyproject.toml
• python/packages/jumpstarter-driver-pi-pico/pyproject.toml
• python/packages/jumpstarter-driver-power/pyproject.toml
• python/packages/jumpstarter-driver-probe-rs/pyproject.toml
• python/packages/jumpstarter-driver-pyserial/pyproject.toml
• python/packages/jumpstarter-driver-qemu/pyproject.toml
• python/packages/jumpstarter-driver-renode/pyproject.toml
• python/packages/jumpstarter-driver-ridesx/pyproject.toml
• python/packages/jumpstarter-driver-sdwire/pyproject.toml
• python/packages/jumpstarter-driver-shell/jumpstarter_driver_shell/driver.py
• python/packages/jumpstarter-driver-shell/pyproject.toml
• python/packages/jumpstarter-driver-snmp/jumpstarter_driver_snmp/driver.py
• python/packages/jumpstarter-driver-snmp/jumpstarter_driver_snmp/driver_test.py
• python/packages/jumpstarter-driver-snmp/pyproject.toml
• python/packages/jumpstarter-driver-someip/pyproject.toml
• python/packages/jumpstarter-driver-ssh-mitm/pyproject.toml
• python/packages/jumpstarter-driver-ssh-mount/pyproject.toml
• python/packages/jumpstarter-driver-ssh/pyproject.toml
• python/packages/jumpstarter-driver-stlink-msd/pyproject.toml
• python/packages/jumpstarter-driver-tasmota/pyproject.toml
• python/packages/jumpstarter-driver-tftp/jumpstarter_driver_tftp/driver.py
• python/packages/jumpstarter-driver-tftp/pyproject.toml
• python/packages/jumpstarter-driver-tmt/pyproject.toml
• python/packages/jumpstarter-driver-uboot/pyproject.toml
• python/packages/jumpstarter-driver-uds-can/pyproject.toml
• python/packages/jumpstarter-driver-uds-doip/pyproject.toml
• python/packages/jumpstarter-driver-uds/pyproject.toml
• python/packages/jumpstarter-driver-ustreamer/pyproject.toml
• python/packages/jumpstarter-driver-vnc/pyproject.toml
• python/packages/jumpstarter-driver-xcp/pyproject.toml
• python/packages/jumpstarter-driver-yepkit/pyproject.toml
• python/packages/jumpstarter-imagehash/pyproject.toml
• python/packages/jumpstarter-kubernetes/pyproject.toml
• python/packages/jumpstarter-mcp/pyproject.toml
• python/packages/jumpstarter-protocol/pyproject.toml
• python/packages/jumpstarter-testing/pyproject.toml
• python/packages/jumpstarter/pyproject.toml
• python/pyproject.toml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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