chore: 🚢 release v1.9.0

[PasteurBot]

This PR contains the generated changelog for the release v1.9.0.

⚠️ Merging this PR will immediately trigger a new release. ⚠️

To specify additional release notes, please edit this comment after the following line.

---

Highlights

Environment variables in tesseract_config.yaml

You can now set environment variables directly in tesseract_config.yaml via a new env: section, without resorting to custom_build_steps:

env:
  XLA_PYTHON_CLIENT_PREALLOCATE: "false"
  OMP_NUM_THREADS: "4"

These values are baked into the Docker image at build time. You can still override them at runtime with tesseract serve --env or tesseract run --env. (#591)

Timeout parameter for the Python API

Tesseract.from_image() and Tesseract.from_url() now accept an optional timeout parameter to guard against hanging HTTP requests (e.g. when a container runs out of memory):

with Tesseract.from_image("my_tesseract", timeout=30) as t:
    ...

# or use a (connect, read) tuple for finer control
t = Tesseract.from_url("http://host:8000", timeout=(5, 300))

The default remains no timeout, so existing code is unaffected. (#597)

Tesseract.container_info()

A new container_info() method on the Tesseract class exposes the underlying Docker container object during a serve session. This is useful for resource monitoring, executing commands inside the container, or retrieving container logs outside of the SDK:

with Tesseract.from_image("my_tesseract") as t:
    container = t.container_info()
    print(container.id, container.name, container.host_port)

(#601)

Other changes

• tesseract serve now supports a --skip-health-check flag (also available as skip_health_check in Tesseract.from_image()). Use this for Tesseracts with slow startup, e.g. due to JIT compilation or large model loading. The caller is responsible for polling /health manually. (feat: add tesseract serve --skip-health-check argument #596)
• Foreign array-like objects such as PyTorch tensors can now be passed directly to the Python API without manual conversion. (fix: better support for foreign arrays (like torch tensors) in Python API #587)
• Docker builds no longer fail when the base image sets a non-root default user. (fix: Always become root at the start of docker builds #598)
• IO schemas now include explicit field declaration order in their metadata (field_order), allowing downstream clients to restore the correct order even after round-tripping through systems that scramble JSON keys. (feat: Explicitly export IO schema field order #595)
• click is now an explicit dependency, fixing potential import errors with newer versions of typer. (fix: add click to base install dependencies #610)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.22%. Comparing base (cbc8f76) to head (259307a).

❗ There is a different number of reports uploaded between BASE (cbc8f76) and HEAD (259307a). Click for more details.

HEAD has 29 uploads less than BASE

Flag	BASE (cbc8f76)	HEAD (259307a)
	35	6

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #612      +/-   ##
==========================================
- Coverage   77.16%   67.22%   -9.94%     
==========================================
  Files          32       32              
  Lines        4519     4519              
  Branches      743      743              
==========================================
- Hits         3487     3038     -449     
- Misses        727     1237     +510     
+ Partials      305      244      -61     

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