feat(call): implement OperationContext, AbortPolicy, CompositionAuthority, ScopedOperationEnv (task: call/registry/operation-context)
Implement operation context types in registry/context.rs: OperationContext (10
fields, internal pub(crate) + is_internal()), AbortPolicy (AbortDependents
default), CompositionAuthority (none/new/as_identity for ACL), ScopedOperationEnv
(empty/new/allows), generate_request_id (UUID v4). Added minimal OperationEnv
trait in registry/env.rs (invoke/invoke_with_policy/contains) so the env field
compiles — operation-env task will expand with LocalOperationEnv and
CompositeOperationEnv. 37 unit tests.
Refs: docs/architecture/crates/call/operation-registry.md
Implements: ADR-015, ADR-022, ADR-024
glm-5.2
fbc30d281e