Feat/retire fallback scheduler

[BelhsanHmida]

Description

• Turn on SoC constraint relaxation by default for storage scheduling requests.
• Remove the built-in storage fallback scheduler, so infeasible storage problems now surface as scheduling failures instead of silently producing fallback schedules.
• Keep the generic fallback redirect/job machinery available for custom schedulers.
• Update tests and documentation to reflect the new default relaxation and infeasibility behavior.
• Changelog entry added

Look & Feel

N/A

How to test

pytest flexmeasures/data/schemas/tests/test_scheduling.py \
  flexmeasures/api/v3_0/tests/test_sensor_schedules.py \
  flexmeasures/data/tests/test_scheduling_sequential.py \
  flexmeasures/data/models/planning/tests/test_storage.py

Also ran the targeted solver fallback-retirement test.

Related Items

Closes #2201

Sign-off

• I confirm that my contribution follows the contribution guidelines.
• I certify that I wrote the contribution or otherwise have the right to submit it under the project license.

[BelhsanHmida]

Manual test done through Swagger UI:

1. Triggered a storage schedule through:

POST /api/v3_0/assets/8/schedules/trigger

with a flex model that creates a failing storage scheduling job.

2. The trigger request was accepted and returned a schedule job UUID:

775b2af5-88dd-4988-affd-8b11ec025841

3. Fetched the schedule through:

GET /api/v3_0/sensors/23/schedules/775b2af5-88dd-4988-affd-8b11ec025841?duration=PT24H&unit=kW&sign-convention=consumption-positive

4. The response was:

400 BAD REQUEST

with:

{
  "message": "No known schedule for this time period. Scheduling job failed with ValueError: Power capacity on asset 8 is not defined in the flex-model. StorageScheduler was used.",
  "result": "Rejected",
  "status": "UNKNOWN_SCHEDULE"
}

[Copilot]

Pull request overview

This PR retires the built-in storage fallback scheduler so infeasible storage scheduling problems surface as explicit scheduling failures, and it enables SoC constraint relaxation by default for storage scheduling requests. It updates schema defaults, OpenAPI/docs, and tests to reflect the new behavior while keeping generic fallback redirect/job machinery for custom schedulers.

Changes:

• Default relax-soc-constraints to True for API scheduling flex-context, with corresponding OpenAPI metadata updates
• Remove StorageFallbackScheduler and its utility fallback policy so infeasible storage schedules fail instead of silently producing fallback schedules
• Update tests and documentation to validate/report the new default relaxation and failure behavior

Reviewed changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
flexmeasures/ui/static/openapi-specs.json	Updates OpenAPI defaults/descriptions for SoC relaxation and related flex-model fields
flexmeasures/data/tests/test_scheduling_sequential.py	Adjusts sequential scheduling tests to assert failure propagation without storage fallback jobs
flexmeasures/data/schemas/tests/test_sensor.py	Refactors quantity assertions to be unit/magnitude-based with tolerance
flexmeasures/data/schemas/tests/test_scheduling.py	Adds regression tests for default SoC relaxation behavior in schema loading
flexmeasures/data/schemas/scheduling/metadata.py	Updates schema metadata text to reflect default SoC relaxation and soft-constraint semantics
flexmeasures/data/schemas/scheduling/init.py	Defaults relax_soc_constraints to true (API) and refines breach-price defaulting behavior; keeps DB default false via override
flexmeasures/data/models/planning/utils.py	Removes fallback charging-policy helpers previously used by storage fallback scheduler
flexmeasures/data/models/planning/tests/test_storage.py	Updates storage relaxation test expectations to match new default SoC breach pricing behavior
flexmeasures/data/models/planning/tests/test_solver.py	Ensures infeasible storage problems raise directly and no fallback scheduler is configured
flexmeasures/data/models/planning/storage.py	Removes StorageFallbackScheduler and unsets storage scheduler fallback class
flexmeasures/api/v3_0/tests/test_sensors_api_freshdb.py	Makes numeric comparisons tolerant to floating-point rounding via pytest.approx
flexmeasures/api/v3_0/tests/test_sensor_schedules.py	Updates API scheduling tests to assert no fallback job creation and direct failure reporting (with/without redirect config)
documentation/features/scheduling.rst	Documents infeasible storage behavior and clarifies which constraints remain hard vs soft by default
documentation/configuration.rst	Clarifies FLEXMEASURES_FALLBACK_REDIRECT as a custom-scheduler fallback mechanism (not built-in storage)
documentation/changelog.rst	Adds user-facing changelog entry for default SoC relaxation and fallback scheduler retirement
documentation/api/introduction.rst	Updates 303 redirect documentation to focus on custom scheduler fallbacks and new storage behavior