Fix shell scripts checked out with CRLF on Windows

[Adarsh04Arun]

Description

On Windows with core.autocrlf=true (the Git for Windows default), *.sh files
are checked out with CRLF line endings. The shebang becomes #!/bin/bash\r, and
every container that execs one fails with a misleading error:

exec /osprey/entrypoint.sh: no such file or directory

This breaks the stock docker compose up path. Affected scripts include
entrypoint.sh, druid/specs/submit-specs.sh and init-minio-bucket.sh.

The project already has an LF policy — .pre-commit-config.yaml runs
mixed-line-ending --fix=lf — but it is only enforced at commit time.
Nothing enforces LF at checkout time, which is where autocrlf breaks it.
This PR closes that half of the gap.

Why no .sh files are in this diff

The repository already stores LF. Verified with:

git show HEAD:entrypoint.sh | od -c | head -3

Only \n appears — no \r. The CRLF is introduced purely on checkout, so
.gitattributes alone is the complete fix and no file contents change.

Verification

Before, on Windows:

$ file entrypoint.sh
entrypoint.sh: Bourne-Again shell script, ASCII text executable, with CRLF line terminators
$ docker compose up
osprey-worker | exec /osprey/entrypoint.sh: no such file or directory

After, on a fresh clone with this change:

$ file entrypoint.sh
entrypoint.sh: Bourne-Again shell script, ASCII text executable
$ docker compose up   # worker starts normally

Summary by CodeRabbit

• Chores
  • Standardized line endings for shell scripts and Dockerfiles to improve consistency across development environments.

[coderabbitai]

📝 Walkthrough

Walkthrough

The PR adds .gitattributes rules that enforce LF line endings for shell scripts, Dockerfile, and Dockerfile variants.

Changes

Line Ending Attributes

Layer / File(s)	Summary
Enforce LF line endings .gitattributes	Adds LF line-ending rules for *.sh, Dockerfile, Dockerfile.*, and *.dockerfile files.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: ayubun, exbreder, haileyok, vinaysrao1

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: preventing shell scripts from using CRLF line endings on Windows.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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