build(deps): bump dashmap from 5.5.3 to 6.1.0

Bumps [dashmap](https://github.com/xacrimon/dashmap) from 5.5.3 to 6.1.0.
- [Release notes](https://github.com/xacrimon/dashmap/releases)
- [Commits](xacrimon/dashmap@v.5.5.3...v6.1.0)

---
updated-dependencies:
- dependency-name: dashmap
  dependency-version: 6.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -56,7 +56,7 @@ reqwest = { version = "0.12", default-features = false, features = ["json","stre
 
 # Rate limiting / Redis
 redis = { version = "0.32", features = ["tokio-comp","aio","connection-manager"] }
-dashmap = "5"
+dashmap = "6"
 
 # Database (added for persistence phase groundwork)
 sqlx = { version = "0.8", features = ["runtime-tokio-rustls","postgres","uuid","chrono","macros"] }