The guides described every placement as spawn-run-reap and omitted
the trampoline allowlist required when reusing an existing actor.
- distinguish call-owned children from caller-owned portal actors
- document stable module-global target addresses and allowlists
- add the #477 feature news fragment
(this patch was generated in some part by `opencode` using
`gpt-5.6-sol` (`openai`))
Gud Boi
a849161fa5