refactor(reliability)!: delete unconsumed reliability profiles module (LAB-6352)

[27Bslash6]

Summary

Deletes cachekit.reliability.profiles and its test module. Nothing in src/ reads the module now that the create_decorator_config family is gone (#338). Its docstrings implied a runtime effect that no code path delivers, and recommend_profile() returned advice that no API could apply.

• src/cachekit/reliability/profiles.py deleted: ReliabilityProfile, ProfileConfig, PROFILE_CONFIGS, get_profile_config, get_profile_description, recommend_profile, HIGH_THROUGHPUT_THRESHOLD_RPS and LOW_THROUGHPUT_THRESHOLD_RPS.
• tests/critical/test_reliability_profiles.py deleted. It only checked the constant table against itself.
• src/cachekit/reliability/__init__.py drops the profiles import block and its four __all__ entries, and its docstring no longer lists "reliability profiles".

There is no deprecation alias. cachekit-py is pre-1.0, so this ships as a breaking minor through release-please.

Verification

• uv run ruff check src/ tests/ and uv run ruff format --check src/ tests/ both pass.
• uv run pytest tests/unit tests/critical -m "not slow": 4038 passed, 25 skipped.
• uv run pytest --doctest-modules src/cachekit --ignore=src/cachekit/_rust_serializer.py: 110 passed, 14 skipped.
• python -c "import cachekit.reliability.profiles" raises ModuleNotFoundError, and from cachekit.reliability import ReliabilityProfile raises ImportError.
• A grep for every removed symbol over src/ tests/ docs/ README.md llms.txt returns nothing, and so does the same grep over cachekit-io/docs main.

Docs

No docs needed: no README, docs/, llms.txt or docs-site page names the removed symbols. The "reliability profile" wording in docs/features/interop-mode.md describes an intent preset's reliability features, not this module, so it stays. release-please writes the CHANGELOG entry from the footer below.

Migration

Nothing to migrate. No cachekit API consumed these values, so removing them changes no runtime behaviour. Configure reliability through the @cache intent presets or CircuitBreakerConfig.

Closes LAB-6352

BEGIN_COMMIT_OVERRIDE
refactor(reliability)!: delete unconsumed reliability profiles module (LAB-6352) (#445)

BREAKING CHANGE: removed the cachekit.reliability.profiles module, with ReliabilityProfile, ProfileConfig, PROFILE_CONFIGS, get_profile_config, get_profile_description, recommend_profile, HIGH_THROUGHPUT_THRESHOLD_RPS and LOW_THROUGHPUT_THRESHOLD_RPS; cachekit.reliability no longer re-exports ReliabilityProfile, ProfileConfig, get_profile_config or recommend_profile. No cachekit API read these values, so no runtime behaviour changes.
END_COMMIT_OVERRIDE

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Reviewing files that changed from the base of the PR and between b9ad394 and dcc7617.

📒 Files selected for processing (3)

• src/cachekit/reliability/__init__.py
• src/cachekit/reliability/profiles.py
• tests/critical/test_reliability_profiles.py

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