Implement workspace evolution, migrations, and runtime continuity

Enable evolution by default for source-backed workspaces. Add stable
conformance ownership, semantic-major review, candidate typechecking,
and durable fenced cutover with explicit migrations and forward recovery.

Independently supervise package runtimes so unchanged resource owners keep
their processes and connections across cutover. Add scoped invocation
authority, resource sessions, and typed callback rebinding.

Wire opaque object references through generated bindings and RPCs. Add
canonical relationship sets, keyed maps, and ordered lists with scoped
transactional mutations, revision checks, and inverse consistency. Support
planned cascade deletion, protection, tombstones, and lifecycle foundations.

Add journaled structural edits, package/function/migration scaffolding,
managed repository creation, and resumable bottom-up dependency pin
publication. Document lifetime boundaries, revision pinning, prototype
compatibility policy, commands, and deferred work.

Validate with 210 tests, user-systemd process/connection continuity,
generated-package TypeScript checks, and Nix host/protocol checks.
TTL handoff, physical reclamation, general multi-step migrations, and
root-systemd migration isolation acceptance remain deferred.

proto/camino/schema.proto

@@ -18,6 +18,7 @@ message AtomDefinition {
 message AtomConformance {
   string atom_id = 1;
   string interface_revision_id = 2;
+  string conformance_id = 3;
 }
 
 message StateAttachment {
@@ -27,6 +28,7 @@ message StateAttachment {
   string value_type_json = 4;
   string storage_policy_json = 5;
   string default_value_json = 6;
+  string owner_conformance_id = 7;
 }
 
 message EndpointConstraint {
@@ -42,6 +44,13 @@ message EdgeEndpoint {
   EndpointConstraint constraint = 3;
   Cardinality cardinality = 4;
   bool ordered = 5;
+  // Empty means restrict. Direction is the endpoint being deleted.
+  string on_delete = 6;
+  bool retain_other = 7;
+  // Empty for sets/lists, otherwise string, boolean, or int64 map keys.
+  string key_type = 8;
+  // Explicit read-only dependency injection traversal, not mutation authority.
+  bool public_traversal = 9;
 }
 
 message EdgeAttachment {
@@ -49,6 +58,7 @@ message EdgeAttachment {
   string display_name = 2;
   EdgeEndpoint first = 3;
   EdgeEndpoint second = 4;
+  string owner_conformance_id = 5;
 }
 
 // Camino consumes this persistence-only projection of a checked workspace.