style: cargo fmt --all — make codebase rustfmt-clean

First run of the build-and-test CI gate (cargo fmt --all -- --check) surfaced
pre-existing formatting drift across the agent and server crates. Apply rustfmt
across the workspace so the codebase meets its own CI gate. Pure formatting; no
logic changes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

server/src/utils/validation.rs

@@ -11,18 +11,29 @@ use anyhow::{anyhow, Result};
 pub fn validate_api_key_strength(api_key: &str) -> Result<()> {
     // Minimum length check
     if api_key.len() < 32 {
-        return Err(anyhow!("API key must be at least 32 characters long for security"));
+        return Err(anyhow!(
+            "API key must be at least 32 characters long for security"
+        ));
     }
 
     // Check for common weak keys
     let weak_keys = [
-        "password", "12345", "admin", "test", "api_key",
-        "secret", "changeme", "default", "guruconnect"
+        "password",
+        "12345",
+        "admin",
+        "test",
+        "api_key",
+        "secret",
+        "changeme",
+        "default",
+        "guruconnect",
     ];
     let lowercase_key = api_key.to_lowercase();
     for weak in &weak_keys {
         if lowercase_key.contains(weak) {
-            return Err(anyhow!("API key contains weak/common patterns and is not secure"));
+            return Err(anyhow!(
+                "API key contains weak/common patterns and is not secure"
+            ));
         }
     }
 
@@ -53,6 +64,9 @@ mod tests {
         assert!(validate_api_key_strength("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa").is_err());
 
         // Good key
-        assert!(validate_api_key_strength("KfPrjjC3J6YMx9q1yjPxZAYkHLM2JdFy1XRxHJ9oPnw0NU3xH074ufHk7fj").is_ok());
+        assert!(validate_api_key_strength(
+            "KfPrjjC3J6YMx9q1yjPxZAYkHLM2JdFy1XRxHJ9oPnw0NU3xH074ufHk7fj"
+        )
+        .is_ok());
     }
 }