fix(registry): chain_membership alphabetic sort per code review (task 9)

6 узлов имели numeric sort (L7,L13) вместо alphabetic (L13,L7):
#10 Boost / #25 Semgrep / #34 Sentry / #35 Redis / #39 Trail of Bits / #43 deptrac.

Alphabetic порядок («L13» < «L7» char-by-char) — спецификация
этапа 1 (rendered tables дают стабильный output без числовых сюрпризов).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/registry/nodes.yaml

@@ -145,7 +145,7 @@ nodes:
       - {keyword: "roster auto-detect", weight: 1.0}
     boundaries:
       - {pair: "#1", relation: "replaces"}
-    chain_membership: ["L7", "L13"]
+    chain_membership: ["L13", "L7"]
     attributes:
       tooling_section: "§3.5 #10"
       install: "composer require laravel/boost --dev"
@@ -402,7 +402,7 @@ nodes:
       - {keyword: "security static analysis", weight: 1.0}
     boundaries:
       - {relation: "связка binary+mcp"}
-    chain_membership: ["L6", "L15"]
+    chain_membership: ["L15", "L6"]
     attributes:
       tooling_section: "§5.1 #25"
       install: "npm run sast"
@@ -546,7 +546,7 @@ nodes:
     triggers:
       - {keyword: "отладка production runtime errors", weight: 1.0}
     boundaries: []
-    chain_membership: ["L8", "L13"]
+    chain_membership: ["L13", "L8"]
     attributes:
       tooling_section: "§4.8 #34"
 
@@ -563,7 +563,7 @@ nodes:
       - {keyword: "pest-race", weight: 1.0}
     boundaries:
       - {relation: "read-only"}
-    chain_membership: ["L8", "L13"]
+    chain_membership: ["L13", "L8"]
     attributes:
       tooling_section: "§4.9 #35"
 
@@ -628,7 +628,7 @@ nodes:
       - {keyword: "diff", weight: 1.0}
       - {keyword: "supply-chain", weight: 1.0}
     boundaries: []
-    chain_membership: ["L6", "L15"]
+    chain_membership: ["L15", "L6"]
     attributes:
       tooling_section: "§4.14 #39"
       install: "enabledPlugins subsets из trailofbits/skills"
@@ -695,7 +695,7 @@ nodes:
       - {keyword: "границы слоёв", weight: 1.0}
     boundaries:
       - {relation: "lefthook job 10"}
-    chain_membership: ["L5", "L14"]
+    chain_membership: ["L14", "L5"]
     attributes:
       tooling_section: "§4.18 #43"
       install: "composer require --dev deptrac/deptrac"