Refactor/61 remove unused code

[jathavaan]

This pull request makes minor improvements to import statements in two service interface files. The changes primarily involve cleaning up unused imports to keep the codebase tidy. No functional or behavioral changes were introduced.

[Copilot]

Pull request overview

This PR removes two presentation notebooks and cleans up unused imports in FKB service interfaces. The code changes themselves are straightforward, but the notebook deletions are broader than what the PR description currently states.

Changes:

• Delete 04-1-conflation-same-source-search.ipynb from the presentation notebooks.
• Delete 02-2-fkb-conversion.ipynb from the presentation notebooks.
• Remove unused pystac.Catalog and BytesIO imports from fkb_service_interface.py and fkb_file_service_interface.py respectively.

Reviewed changes

Copilot reviewed 4 out of 9 changed files in this pull request and generated no comments.

File	Description
src/presentation/notebooks/04-1-conflation-same-source-search.ipynb	Entire notebook removed from the repository.
src/presentation/notebooks/02-2-fkb-conversion.ipynb	Entire notebook removed from the repository.
src/application/contracts/fkb_service_interface.py	Removed unused pystac.Catalog import; interface continues to use geopandas and EPSGCode only.
src/application/contracts/fkb_file_service_interface.py	Removed unused io.BytesIO import; interface now only exposes byte-based ZIP APIs and geopandas return types.

Comments suppressed due to low confidence (2)

src/presentation/notebooks/04-1-conflation-same-source-search.ipynb:1

• The PR description mentions only minor import cleanups in service interface files with no functional or behavioral changes, but this change fully removes this notebook file. Please confirm that deleting this notebook is intentional and consider updating the PR description to reflect this broader change.
  src/presentation/notebooks/02-2-fkb-conversion.ipynb:1
• The PR description states that only minor import cleanups in service interface files are being made with no functional or behavioral changes, but this change completely removes this notebook. Please verify that this deletion is intended and update the PR description if necessary to reflect the removal of presentation notebooks.

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