Enforce Genarrative play-type SOP and update docs

Rewrite Genarrative play-type integration guidance across .codex and .hermes to define a platform-level SOP: default to form/image workbench, unify single-image asset slots (CreativeImageInputPanel), standardize series-material sheet->cut->transparent->OSS pipeline, and forbid copying legacy chat/agent workflows as the default. Add decision-log entry freezing the SOP and a pitfalls note warning against direct reuse of old play tools. Update CONTEXT.md and docs/README.md, add a new PRD file, and apply related small server-side changes (module-auth, spacetime-client mappers and runtime) to align back-end code with the new contracts and flows.

server-rs/crates/spacetime-module/src/lib.rs

@@ -8,6 +8,7 @@ pub use module_big_fish::*;
 pub use module_combat::*;
 pub use module_custom_world::*;
 pub use module_inventory::*;
+pub use module_jump_hop::*;
 pub use module_npc::*;
 pub use module_progression::*;
 pub use module_quest::*;
@@ -29,6 +30,7 @@ mod custom_world;
 mod domain_types;
 mod entry;
 mod gameplay;
+mod jump_hop;
 mod match3d;
 mod migration;
 mod puzzle;
@@ -45,6 +47,7 @@ pub use custom_world::*;
 pub use domain_types::*;
 pub use entry::*;
 pub use gameplay::*;
+pub use jump_hop::*;
 pub use match3d::*;
 pub use migration::*;
 pub use runtime::*;