docs: bump README version strings to 0.5

Author: vbasky

README.md

@@ -18,7 +18,7 @@ migrations.
 
 ```toml
 [dependencies]
-somnia = "0.4"
+somnia = "0.5"
 ```
 
 ---
@@ -215,7 +215,7 @@ the full list).
 
 ## Status
 
-`0.4.x` — early but tested against SurrealDB 3.x (query builder, derive, schema
+`0.5.x` — early but tested against SurrealDB 3.x (query builder, derive, schema
 generation, and migrator all covered by integration tests that run on an
 in-memory engine). The API may evolve before `1.0`. See the
 [roadmap](ROADMAP.md) for what's covered today and what's planned on the way to

crates/somnia/README.md

@@ -17,7 +17,7 @@ migrations.
 
 ```toml
 [dependencies]
-somnia = "0.4"
+somnia = "0.5"
 ```
 
 ---
@@ -214,7 +214,7 @@ the full list).
 
 ## Status
 
-`0.4.x` — early but tested against SurrealDB 3.x (query builder, derive, schema
+`0.5.x` — early but tested against SurrealDB 3.x (query builder, derive, schema
 generation, and migrator all covered by integration tests that run on an
 in-memory engine). The API may evolve before `1.0`. See the
 [roadmap](https://github.com/vbasky/somnia/blob/main/ROADMAP.md) for what's covered today and what's planned on the way to