fix: resolve integration test compilation + CI errors

Test compilation fixes (8 integration test files):
  1. Ambiguous float types — added f32/f64 annotations
  2. chrono API — replaced with_hour() with date_naive().and_hms_opt()
  3. Missing dev-dependencies — added sqlx + base64
  4. Generic parse — wrapped f32 comparison in parens
  5. Incorrect assertion — 3^5=243 > 100, changed nodes to 1000

CI fixes:
  6. Missing benchmark fixtures — created 3 files in fixtures/benchmarks/
  7. clippy absurd_extreme_comparisons — usize >= 0 always true
  8. authentik_jwt test — Option<SystemTime> type mismatch
  9. http_server tests — removed broken RBAC test module (types deleted)

Result: cargo build --all clean, cargo test --all --lib passes

crates/mem-ingest/src/authentik_jwt.rs

@@ -136,13 +136,13 @@ mod tests {
             access_token: "test".to_string(),
             token_type: "Bearer".to_string(),
             expires_in: 3600,
-            obtained_at: SystemTime::now(),
+            obtained_at: Some(SystemTime::now()),
         };
 
         assert!(!token.is_expired());
 
         // Simulate aged token
-        token.obtained_at = SystemTime::now() - Duration::from_secs(3600);
+        token.obtained_at = Some(SystemTime::now() - Duration::from_secs(3600));
         assert!(token.is_expired());
     }