Add support for vacuum to delete files no longer referenced by a table

[CGodiksen]

This PR adds support for simple VACUUM SQL statements to delete files that are no longer referenced by a table. The PR adds support for VACUUM which vacuums all tables as well as VACUUM table_name and VACUUM table_name_1, table_name_2.

Note that it is only possible to set the retention period using an environment variable for now. #343 has been created to make it possible to specify the retention period in the statement in the future.

[Copilot]

Pull Request Overview

This PR adds support for SQL VACUUM statements to delete files that are no longer referenced by a table. VACUUM can be used to vacuum all tables or specific tables by name, with retention period controlled via environment variable.

• Adds VACUUM SQL statement parsing and execution support
• Implements vacuum functionality across all components (server, manager, embedded)
• Adds configuration for retention period with default of 7 days

Reviewed Changes

Copilot reviewed 15 out of 16 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
protocol.proto	Adds retention_period_in_seconds field to Configuration message
parser.rs	Adds VACUUM statement parsing using ShowVariable as substitute
delta_lake.rs	Implements vacuum_table method using Delta Lake vacuum operations
Cargo.toml	Adds chrono dependency for time delta calculations
integration_test.rs	Adds comprehensive vacuum integration tests
remote.rs	Adds vacuum SQL statement support to Flight service
context.rs	Implements vacuum_table method with retention period configuration
configuration.rs	Adds retention period configuration management
operations/mod.rs	Adds vacuum method to Operations trait
operations/data_folder.rs	Implements vacuum for local data folder operations
operations/client.rs	Implements vacuum for remote client operations
capi.rs	Adds C API binding for vacuum operations
operations.py	Adds Python binding for vacuum functionality

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