fix: add missing dev-dependencies + fix test assertion

- Added tracing, tracing-subscriber, reqwest, uuid to [dev-dependencies]
  (test files referenced these crates but they weren't available)
- Fixed test assertion: WikiLinkFallbackExtractor extracts [[Concurrency]]
  not 'Go' from text 'Go [[Concurrency]] is powerful'

Cargo.toml

@@ -66,6 +66,10 @@ chrono = { version = "0.4", features = ["serde"] }
 regex = { workspace = true }
 sqlx = { workspace = true }
 base64 = { workspace = true }
+tracing = { workspace = true }
+tracing-subscriber = { workspace = true }
+reqwest = { workspace = true }
+uuid = { workspace = true }
 
 [profile.release]
 opt-level = 3