Add a reusable PKI session and typed synchronous operation executor
shared by direct CLI commands and versioned sequential batch plans.
Provide deterministic references, structured output, failure policies and
safe lifecycle handling without introducing a scripting language or runtime.
feat: move integrations from lib to ext
feat: move content export from lib to ext
feat: rename affected packages for separate module distribution
chore: update Gradle module wiring
chore: adjust JPMS descriptors and dependencies
docs: update module structure documentation
