DM-41952: Add flux sampling of full covariance model to preKernel

[Alex-Broughton]

No description provided.

[plazas]

Thanks for this! I left a few comments and requested a few changes.

[Alex-Broughton]

I ran the test case for me, but do you mind giving it a look over?

BTW: here's the pipeline I used to test this ticket branch:

description: cp_pipe brighter-fatter kernel calibration construction.
tasks:
  bfkSolve1:
    class: lsst.cp.pipe.BrighterFatterKernelSolveTask
    config:
      connections.inputPtc: ptc
      connections.outputBFK: bfk_10000adu
      covModelFluxSample: {'ALL_AMPS': 10000}
      useCovModelSample: True
      correlationQuadraticFit: False
      correlationModelRadius: 3
      correlationModelSlope: -1.71
      forceZeroSum: True
  bfkSolve2:
    class: lsst.cp.pipe.BrighterFatterKernelSolveTask
    config:
      connections.inputPtc: ptc
      connections.outputBFK: bfk_20000adu
      covModelFluxSample: {'ALL_AMPS': 20000}
      useCovModelSample: True
      correlationQuadraticFit: False
      correlationModelRadius: 4
      correlationModelSlope: -1.71
      forceZeroSum: True
  bfkSolve3:
    class: lsst.cp.pipe.BrighterFatterKernelSolveTask
    config:
      connections.inputPtc: ptc
      connections.outputBFK: bfk_30000adu
      covModelFluxSample: {'ALL_AMPS': 30000}
      useCovModelSample: True
      correlationQuadraticFit: False
      correlationModelRadius: 4
      correlationModelSlope: -1.71
      forceZeroSum: True
  bfkSolve4:
    class: lsst.cp.pipe.BrighterFatterKernelSolveTask
    config:
      connections.inputPtc: ptc
      connections.outputBFK: bfk_40000adu
      covModelFluxSample: {'ALL_AMPS': 40000}
      useCovModelSample: True
      correlationQuadraticFit: False
      correlationModelRadius: 4
      correlationModelSlope: -1.71
      forceZeroSum: True
  bfkSolve5:
    class: lsst.cp.pipe.BrighterFatterKernelSolveTask
    config:
      connections.inputPtc: ptc
      connections.outputBFK: bfk_50000adu
      covModelFluxSample: {'ALL_AMPS': 50000}
      useCovModelSample: True
      correlationQuadraticFit: False
      correlationModelRadius: 4
      correlationModelSlope: -1.71
      forceZeroSum: True

bps-bfk.yaml:

pipelineYaml: "~/pipelines/cpBfkSolve_covSample.yaml"

project: dev
campaign: quick
computeSite: s3df

# Make sure these values correspond to ones in the bin/run_demo.sh's
# pipetask command line.
payload: # defaults to u/abrought/...
  payloadName: "dev-tests/bfk.1.21.2024.v12"
  butlerConfig: "/repo/ir2"
  inCollection: "u/abrought/run6/ptc.2024.01.09.run13540,u/abrought/tests/cti.2024.01.09.version1d,u/lsstccs/defects_13531_w_2023_41/20231111T010016Z,u/lsstccs/flat_13531_w_2023_41/20231111T005006Z,u/lsstccs/dark_13531_w_2023_41/20231111T004259Z,u/lsstccs/bias_13531_w_2023_41/20231111T003418Z,LSSTCam/raw/all,LSSTCam/calib,LSSTCam/photodiode"
  dataQuery: "instrument='LSSTCam' AND exposure IN (2023111301238) AND detector IN (23)"

[plazas]

Thanks for addressing the comments! I'm happy if Jenkins is happy