php-cluster: doctrine-orm-0001 + composer-0003 CWE-407 defects; count 668→670

doctrine-orm-0001: ClassMetadata::addSubClass in_array O(S²) subclasses list HIGH
  - src/Mapping/ClassMetadata.php addSubClass() scans plain $subClasses list
  - addSubClasses($parent->subClasses) called in doLoadMetadata: O(S²) per class
  - Fix: parallel $subClassesSet hash for O(1) membership; 500x at S=1000

composer-0003: InstalledRepository::getDependents in_array O(P²) needles list MEDIUM
  - needles array grows during foreach($packages) loop, in_array scan 3 sites
  - $packagesFoundSet already exists for cycle-detection but needles is separate
  - Fix: add $needlesSet = array_fill_keys($needles, true), mirror growth; 1000x at P=1000

cayley: CLEAN (confirmed -- map-based seen/pathMap throughout)
tinkerpop: CLEAN (confirmed -- existing CLEAN.md valid, sort ArrayList is query-plan-time only)

defects/actix-web/patch/CLEAN.md

@@ -0,0 +1,12 @@
+# CLEAN — actix-web
+
+Scanned 2026-03-29 for CWE-407 (algorithmic complexity).
+
+## Findings
+
+- `actix-web/src/middleware/logger.rs` — `exclude` is `HashSet<String>`: O(1) per-request lookup. CLEAN.
+- `actix-web/src/http/header/accept_encoding.rs` — `supported_set` collected as `HashSet<&Encoding>` before iteration. CLEAN.
+- `actix-web/src/introspection.rs` — `update_unique` uses `Vec::contains()` for HTTP methods/guards/patterns, but these lists are bounded to <10 items each and only called once at app startup (route registration), not per request. Not actionable.
+- All other `contains()` calls use bitflags, ranges, or string substring checks — not collection membership.
+
+**Result: No actionable CWE-407 defects.**