refactor: amend GeographicCoordinate in common in celerity module

[michealroberts]

refactor: amend GeographicCoordinate in common in celerity module

[Copilot]

Pull Request Overview

This pull request refactors the GeographicCoordinate type definition in the celerity module to use more descriptive field names. The changes rename coordinate fields from abbreviated forms (lat, lon, el) to their full descriptive names (latitude, longitude, elevation).

• Updates the GeographicCoordinate TypedDict definition to use full field names
• Updates all test files and source modules to use the new field names
• Maintains backwards compatibility by updating all references consistently

Reviewed Changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/celerity/common.py	Updates GeographicCoordinate type definition with descriptive field names
src/celerity/coordinates.py	Updates coordinate conversion functions to use new field names and reorganizes imports
src/celerity/transit.py	Updates transit calculation functions to use new latitude field name
src/celerity/temporal.py	Updates time conversion function to use new longitude field name
src/celerity/astrometry.py	Updates parallactic angle calculation to use new field names
tests/*.py	Updates all test files to use new field names in observer coordinate definitions

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