improving async fastapi sqlmodel skill

docs/skills/async-fastapi-sqlmodel/references/implicit_io.md

@@ -66,13 +66,13 @@ roles = await user.awaitable_attrs.roles
 
 ## Practical Enforcement Model
 
-Use phased enforcement:
+Require explicit I/O behavior on every async ORM path:
 
-1. High-traffic and latency-sensitive routes: enforce explicit eager loading.
-2. Background tasks and less critical paths: track and progressively tighten.
-3. Add review checks to prevent newly introduced implicit-load hotspots.
+1. Define loader options for relationships and deferred columns needed by the operation.
+2. Use `refresh()` or awaitable attributes only when the additional query is deliberate and visible.
+3. Add review checks that reject unplanned lazy-load paths.
 
-This keeps modernization pragmatic while reducing hidden I/O over time.
+This keeps event-loop behavior predictable and makes query boundaries reviewable from the code.
 
 ---
 
@@ -99,9 +99,3 @@ This keeps modernization pragmatic while reducing hidden I/O over time.
 - Tests verify expected data is present without hidden secondary query surprises.
 - Regression tests exist for routes previously affected by implicit-load failures.
 
----
-
-## Migration Notes
-
-- Start advisory: target high-risk paths first.
-- As coverage improves, elevate selected rules to mandatory in code review policy.