fix: architectural improvements per Opus analysis

1. Version sync: provider/main.go = profile.env = 5.0.60
2. docs-generator: removed detectVersion() — no more dependency on provider/
3. docs-generator: removed detectRoot(), pickPath() — all paths via flags/env
4. docs-generator: require --version, --resources, --docs flags
5. Auto-rebuild: yaml-generator rebuilds if sources newer than binary
6. Three version vars → one VERSION in profile.env
7. Created TOOLS/lib/ — shared YAML contract types (not yet integrated)

TOOLS/config/test/profile.env

@@ -2,10 +2,8 @@
 NUBES_API_ENDPOINT="https://lk-api-gateway-test.ngcloud.ru/api/v1/svc"
 TOKEN_FILE="secrets/test.token"
 
-# Release versions
-RELEASE_VERSION="5.0.60"
-PROVIDER_VERSION="5.0.60"
-DOCS_VERSION="5.0.60"
+# Version
+VERSION="5.0.60"
 
 # Docs generation — ONLY from docs_gen/<stand>/ (never from docs/)
 DOCS_GEN_DIR="provider/docs_gen/test"