refactor: nightly hardening - pydantic config migration

[mouse-value-add]

Problem

PromptLens still used Pydantic v1-style in core models, which emits deprecation warnings on Pydantic v2 and increases risk during future dependency upgrades.

Approach

• Replaced remaining usages with in:
• Preserved existing behavior for and examples.

Verification

• Ran test suite: ============================= test session starts ==============================
  platform darwin -- Python 3.12.13, pytest-9.0.3, pluggy-1.6.0
  rootdir: /Users/mouse/.openclaw/workspace/PromptLens
  configfile: pyproject.toml
  testpaths: tests
  plugins: cov-7.1.0, anyio-4.13.0
  collected 9 items

tests/test_cli_hardening.py ... [ 33%]
tests/test_http_provider_response_parsing.py .... [ 77%]
tests/test_loader_top_level_validation.py .. [100%]

=============================== warnings summary ===============================
promptlens/providers/google.py:8
/Users/mouse/.openclaw/workspace/PromptLens/promptlens/providers/google.py:8: FutureWarning:

All support for the google.generativeai package has ended. It will no longer be receiving
updates or bug fixes. Please switch to the google.genai package as soon as possible.
See README for more details:

https://github.com/google-gemini/deprecated-generative-ai-python/blob/main/README.md

import google.generativeai as genai

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
================================ tests coverage ================================
______________ coverage: platform darwin, python 3.12.13-final-0 _______________

Name Stmts Miss Cover

promptlens/init.py 3 0 100%
promptlens/main.py 3 3 0%
promptlens/cli.py 169 120 29%
promptlens/exporters/init.py 6 0 100%
promptlens/exporters/base.py 15 5 67%
promptlens/exporters/csv_exporter.py 26 14 46%
promptlens/exporters/html_exporter.py 38 25 34%
promptlens/exporters/json_exporter.py 16 6 62%
promptlens/exporters/markdown_exporter.py 77 66 14%
promptlens/judges/init.py 3 0 100%
promptlens/judges/base.py 15 3 80%
promptlens/judges/llm_judge.py 71 50 30%
promptlens/judges/parser.py 107 97 9%
promptlens/judges/prompts.py 30 25 17%
promptlens/loaders/init.py 4 0 100%
promptlens/loaders/base.py 14 3 79%
promptlens/loaders/json_loader.py 23 8 65%
promptlens/loaders/yaml_loader.py 34 17 50%
promptlens/models/init.py 4 0 100%
promptlens/models/config.py 40 0 100%
promptlens/models/result.py 60 13 78%
promptlens/models/test_case.py 23 0 100%
promptlens/models/tools.py 73 34 53%
promptlens/providers/init.py 3 0 100%
promptlens/providers/anthropic.py 52 32 38%
promptlens/providers/base.py 23 6 74%
promptlens/providers/factory.py 21 10 52%
promptlens/providers/google.py 47 28 40%
promptlens/providers/http.py 67 26 61%
promptlens/providers/openai.py 57 36 37%
promptlens/providers/you.py 57 39 32%
promptlens/runners/init.py 2 0 100%
promptlens/runners/runner.py 96 74 23%
promptlens/utils/init.py 1 0 100%
promptlens/utils/cost.py 15 11 27%
promptlens/utils/diff.py 25 25 0%
promptlens/utils/retry.py 21 15 29%
promptlens/utils/timing.py 24 13 46%

TOTAL 1365 804 41%
Coverage HTML written to dir htmlcov
========================= 9 passed, 1 warning in 1.80s =========================

• Result: 9 passed
• Confirmed Pydantic deprecation warnings from these model modules are removed.

Risks

• Low risk, this is a compatibility-focused refactor with no intended runtime behavior changes.

Rollback plan

• Revert commit to restore prior model configuration style if unexpected issues appear.