crewai fails to import on Python 3.14 (chromadb~=1.1.0 pydantic v1 incompatibility)

Description

crewai pins chromadb~=1.1.0 (in lib/crewai/pyproject.toml), which still
ships the pydantic.v1.BaseSettings compatibility layer. That layer is
broken on Python 3.14, which dropped the __fields__ introspection
mechanism pydantic v1 relies on. As a result, import crewai fails outright
on Python 3.14, before any user code runs.

Steps to reproduce

uv venv --python 3.14
uv pip install crewai
uv run python -c "import crewai"

Actual behavior

pydantic.v1.errors.ConfigError: unable to infer type for attribute "chroma_server_nofile"

raised from chromadb/config.py, imported transitively via
crewai.rag.chromadb.config.

Expected behavior

crewai installs and imports successfully on Python 3.14.

Root cause

This is already fixed upstream in chroma-core/chroma#6356 (dropped the
pydantic v1 compat layer), released in chromadb 1.5.x. crewai's pin
(~=1.1.0) simply predates that fix.

Proposed fix (already validated, PR ready)

• Bump the floor to chromadb>=1.5.9,<2 in lib/crewai/pyproject.toml.
• Raise requires-python from <3.14 to <3.15 across the workspace
  members.

I ran the full lib/crewai test suite (4745 tests) under both
configurations (reduced sync, no optional media/docling/qdrant extras, to
keep the comparison apples-to-apples):

Zero new failures introduced by the bump; 7 previously-failing
knowledge-source tests now pass with chromadb 1.5.9. All remaining failures
are identical on both sides and come from optional extras not installed in
this comparison (litellm fallback, docling, qdrant, google-vertex, mcp,
a2a) — unrelated to this change.

PR: #7296 (opened before I saw the first-time-contributor policy — reopening
and referencing this issue as instructed).

🤖 Generated with Claude Code

Start with lib/crewai/pyproject.toml and the workspace members' requires-python settings, then reproduce the failure with the documented uv commands. Verify the dependency and Python-version updates by importing crewai on Python 3.14 and running the lib/crewai test suite; done means the import succeeds without introducing new test failures.