feat: use foundationforecast library

[AzulGarza]

this pr abstracts foundation models and uses foundationforecast instead.

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[Copilot]

Pull request overview

This PR migrates TimeCopilot’s foundation-model integrations to the external foundationforecast library, keeping timecopilot.models.foundation.* as lightweight shims for backward compatibility while updating the unified forecaster to reuse shared multi-model orchestration.

Changes:

• Replace in-repo foundation model implementations with shim classes that inherit from foundationforecast counterparts.
• Switch TimeCopilotForecaster to use foundationforecast.core.multi_model.MultiModelForecasterMixin for multi-model orchestration.
• Update dependencies, docs, and tests to reflect the new foundationforecast-based architecture.

Reviewed changes

Copilot reviewed 22 out of 23 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
uv.lock	Adds foundationforecast and updates locked transitive dependencies.
timecopilot/models/utils/forecaster.py	Re-exports core forecaster utilities/types from foundationforecast.
timecopilot/models/prophet.py	Adds anomaly-series-length override hook for Prophet.
timecopilot/models/foundation/utils.py	Removes local TimeSeriesDataset implementation (migrated to foundationforecast).
timecopilot/models/foundation/toto.py	Converts Toto to a foundationforecast shim.
timecopilot/models/foundation/tirex.py	Converts TiRex to a foundationforecast shim.
timecopilot/models/foundation/timesfm.py	Converts TimesFM to a foundationforecast shim.
timecopilot/models/foundation/timegpt.py	Converts TimeGPT (+ finetuning config) to foundationforecast imports/shim.
timecopilot/models/foundation/tabpfn.py	Converts TabPFN to a foundationforecast shim.
timecopilot/models/foundation/t0.py	Converts T0 to a foundationforecast shim.
timecopilot/models/foundation/sundial.py	Converts Sundial to a foundationforecast shim.
timecopilot/models/foundation/patchtst_fm.py	Converts PatchTST-FM to a foundationforecast shim.
timecopilot/models/foundation/moirai.py	Converts Moirai to a foundationforecast shim.
timecopilot/models/foundation/flowstate.py	Converts FlowState to a foundationforecast shim.
timecopilot/models/foundation/chronos.py	Converts Chronos (+ finetuning config) to foundationforecast imports/shim.
timecopilot/models/foundation/init.py	Updates public exports and python-version gated imports for foundation models.
timecopilot/forecaster.py	Adopts MultiModelForecasterMixin for forecast/CV/anomaly routing.
tests/test_forecaster.py	Adjusts cache-cleaning monkeypatching to match new orchestration behavior.
tests/models/foundation/test_utils.py	Updates dataset import to foundationforecast.core.utils.TimeSeriesDataset.
tests/models/foundation/test_shims.py	Adds coverage asserting shim classes remain Forecaster subclasses and expose core methods.
pyproject.toml	Replaces many per-model dependencies with foundationforecast>=0.1.1.
mkdocs.yml	Preloads foundationforecast for docs generation.
docs/model-hub.md	Documents that foundation implementations live in foundationforecast and are re-exported by TimeCopilot.

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[Copilot]

Pull request overview

Copilot reviewed 24 out of 25 changed files in this pull request and generated no new comments.