Add host parameter to API client

[nicoche]

Priority:

• Env variable KOYEB_API_HOST
• Parameter host
• "https://app.koyeb.com/" (default)

Summary

• Add host parameter to Sandbox.create() and AsyncSandbox.create() methods
• Add host parameter to Sandbox.get_from_id() and AsyncSandbox.get_from_id() methods
• The host parameter allows users to directly specify the Koyeb API host URL instead of relying solely on the KOYEB_API_HOST environment variable

Changes

• Modified Sandbox.__init__() to accept and store the host parameter
• Updated Sandbox.create() to accept host parameter and pass it through to _create_sync()
• Updated Sandbox._create_sync() to accept host parameter and pass it to get_api_clients()
• Updated Sandbox.get_from_id() to accept host parameter and pass it to get_api_clients()
• Updated all internal get_api_clients() calls in Sandbox methods to use self.host
• Updated AsyncSandbox.create() to accept host parameter and pass it through
• Updated AsyncSandbox.get_from_id() to accept host parameter and pass it through

Usage Example

from koyeb.sandbox import AsyncSandbox

# Now you can specify the host directly
sandbox = await AsyncSandbox.create(
    region="na",
    host="https://custom.koyeb.com"
)

# Or use environment variable (existing behavior)
# KOYEB_API_HOST=https://custom.koyeb.com
sandbox = await AsyncSandbox.create(region="na")

Verification

• All existing tests pass
• The host parameter is properly stored in the Sandbox instance
• The host parameter is correctly passed to get_api_clients() which already supported it