Code reorg

[rm-hull]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @rm-hull, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly reorganizes the codebase to improve modularity and maintainability. It transforms the application into a multi-command CLI tool, separating the HTTP API server and data extraction processes into distinct, manageable units. Furthermore, common file handling operations for GeoJSON data have been extracted into a reusable internal package, streamlining data processing workflows.

Highlights

• Application Structure Refactoring: The application's main entry point (main.go) has been refactored to use Cobra commands, enabling distinct api-server and extract-data functionalities, moving away from a single default execution path.
• Code Modularization: Core logic for the HTTP API server and data extraction has been moved into dedicated files (cmd/api_server.go and cmd/extract_data.go respectively) within a new cmd package, significantly improving separation of concerns and code organization.
• Reusable File Operations: A new internal/file_operations.go package has been introduced to centralize common file compression and decompression logic for GeoJSON feature collections, reducing code duplication and promoting reusability across the codebase.
• Developer Experience Improvements: VS Code launch configurations (.vscode/launch.json) and the README.md have been updated to reflect the new command-line interface, simplifying local development setup and usage instructions.

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[github-actions]

	Tests	Passed ❌️	Skipped	Failed
JUnit Test Report	0 ran	0 passed	0 skipped	0 failed

Test	Result
No test annotations available

• View JUnit Test Report

[coveralls]

Pull Request Test Coverage Report for Build 15889588508

Details

• 0 of 127 (0.0%) changed or added relevant lines in 5 files are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage remained the same at 0.0%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
routes/search.go	0	2	0.0%
cmd/extract_data.go	0	13	0.0%
main.go	0	25	0.0%
cmd/api_server.go	0	43	0.0%
internal/file_operations.go	0	44	0.0%

Files with Coverage Reduction	New Missed Lines	%
main.go	3	0.0%

Totals
Change from base Build 15887673281:	0.0%
Covered Lines:	0
Relevant Lines:	428

---

💛 - Coveralls

[gemini-code-assist]

Code Review

This pull request refactors the application to support multiple commands (api-server and extract-data) using the cobra library, which is a great improvement for maintainability. The code is now better organized into cmd and internal packages. The changes are generally good, but I've identified a couple of high-severity issues related to a potential race condition and incorrect server shutdown handling, plus a minor documentation typo. Please review my comments for details and suggestions.

[gemini-code-assist]

This log.Fatalf call is problematic. r.Run() can return http.ErrServerClosed on a graceful shutdown, which should not be treated as a fatal error. Additionally, for other startup errors, Gin's Run method already calls log.Fatalf, making this line unreachable in those cases. This line should only be executed for unexpected errors.

if err != nil && err.Error() != "http: Server closed" {
		log.Fatalf("HTTP API Server failed to start on port %d: %v", port, err)
	}