chore: relax packaging constraint to <27

[hassiebp]

Disclaimer: Experimental PR review

Greptile Summary

This PR relaxes the upper bound on the packaging dependency from <26.0 to <27.0, allowing the library to be used alongside packaging v26.x without version conflicts. The poetry.lock file is regenerated with Poetry 2.3.2 and includes minor normalization of version specifiers.

• pyproject.toml: packaging constraint updated from >=23.2,<26.0 → >=23.2,<27.0
• poetry.lock: Regenerated with Poetry 2.3.2; jsonschema-specifications version string normalized (2023.03.6 → 2023.3.6), cffi pre-release suffix normalized (2.0.0b → 2.0.0b0), and content hash updated — all cosmetic/equivalent changes

Confidence Score: 5/5

• This PR is safe to merge — it is a minimal, low-risk dependency constraint relaxation with no logic changes.
• The only functional change is bumping the packaging upper bound by one major version. The packaging library is stable and well-maintained; v26.x is a backward-compatible release series. No source code is modified.
• No files require special attention.

Important Files Changed

Filename	Overview
pyproject.toml	Relaxes the packaging dependency upper bound from <26.0 to <27.0, allowing compatibility with packaging v26.x releases.
poetry.lock	Lock file regenerated with Poetry 2.3.2; minor normalization of version specifiers (jsonschema-specifications date format, cffi pre-release suffix) and updated content hash.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[langfuse-python] -->|depends on| B{packaging}
    B -->|Before PR: >=23.2, <26.0| C["packaging v23.x / v24.x / v25.x ✅\npackaging v26.x ❌"]
    B -->|After PR: >=23.2, <27.0| D["packaging v23.x / v24.x / v25.x ✅\npackaging v26.x ✅\npackaging v27.x ❌"]

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