Add Filesystem datastore support

[leighmcculloch]

What

Add Filesystem as a supported datastore type alongside GCS and S3. Update example configuration with destination_path and write_metadata parameters. Upgrade go-stellar-sdk dependency to include FilesystemDataStore implementation.

Why

Enable quickstart to publish a meta lake locally without requiring cloud storage configuration (GCS/S3) to support integration testing with galexie with quickstart.

Related:

• Add galexie meta lake quickstart#835
• ingest: add Datastore implementation for a local file system #10
• Add tx-granular ledger snapshot source using meta, RPC, and archives rs-soroban-sdk#1657

Dependent on:

• Add Filesystem datastore support go-stellar-sdk#5892

Close stellar/quickstart#835

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	github.com/​stellar/​go-stellar-sdk@​v0.0.0-20251210093830-27970a00c2d7 ⏵ v0.0.0-20260108045717-08ad73d9ed0e	+1

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[Copilot]

Pull request overview

This pull request adds Filesystem as a supported datastore type to enable local storage for quickstart deployments without requiring cloud storage configuration. The changes upgrade the go-stellar-sdk dependency to include the FilesystemDataStore implementation and update the example configuration to document the new storage option.

• Upgrades go-stellar-sdk dependency to version containing FilesystemDataStore implementation
• Adds Filesystem datastore configuration documentation with destination_path and write_metadata parameters
• Updates datastore type comment to list Filesystem alongside GCS and S3

Reviewed changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated 1 comment.

File	Description
go.sum	Updates checksums for the upgraded go-stellar-sdk dependency
go.mod	Adds replace directive to pin go-stellar-sdk to specific version
config/config.example.toml	Documents Filesystem datastore configuration parameters and updates datastore type comment

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[socket-security]

All alerts resolved. Learn more about Socket for GitHub.

This PR previously contained dependency changes with security issues that have been resolved, removed, or ignored.

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[sreuland]

lgtm, including the pending TODO task.

[leighmcculloch]

@sreuland I addressed the comment about avoiding resetting the variable another way by removing the variable all together since it is a fixed value we can derive. See 0ac51b9.