Update dependency cognite-sdk to v8

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
cognite-sdk	>=7.87.0,<8.0.0 → >=8.0.3,<8.1.0

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: uv.lock

Command failed: uv lock --upgrade-package cognite-sdk
Using CPython 3.14.3 interpreter at: /opt/containerbase/tools/python/3.14.3/bin/python3
  × No solution found when resolving dependencies for split (markers:
  │ python_full_version >= '3.12'):
  ╰─▶ Because cognite-neat>=1.0.43 depends on cognite-sdk>=7.83.0,<8.0.0 and
      only the following versions of cognite-neat are available:
          cognite-neat<=1.0.43
          cognite-neat==1.0.44
          cognite-neat==1.0.45
          cognite-neat==1.0.46
          cognite-neat==1.0.47
          cognite-neat==1.0.48
          cognite-neat==1.0.49
          cognite-neat==1.0.50
          cognite-neat==1.0.51
          cognite-neat==1.0.52
          cognite-neat==1.0.53
          cognite-neat==1.0.54
          cognite-neat==1.0.55
          cognite-neat==1.0.56
      we can conclude that cognite-neat>=1.0.43 depends on
      cognite-sdk>=7.83.0,<8.0.0.
      And because cognite-toolkit[v08] depends on cognite-neat>=1.0.43,
      we can conclude that cognite-toolkit[v08] depends on
      cognite-sdk>=7.83.0,<8.0.0.
      And because your project depends on cognite-sdk>=8.0.3 and your project
      requires cognite-toolkit[v08], we can conclude that your project's
      requirements are unsatisfiable.