chore: rebrand backone names, add lint gate + agent docs

- CI: build/validate use backone selftest + binary names, add lint.yml
- make-*.mk: emit/install backone binaries, drop zerotier-one paths
- doc/debian/ext.installfiles: backone manpages, service, init, te
- rule-compiler: npm test runs test.js; attic world planet files
- AGENTS.md repository guidelines, tools/lint.sh changed-lines gate
- gitignore: /backone-selftest, *.gcno, *.gcda

controller/PostgreSQL.cpp

@@ -199,8 +199,13 @@ PostgreSQL::PostgreSQL(const Identity &myId, const char *path, int listenPort, R
 	}
 	const char *redisMemberStatus = getenv("ZT_REDIS_MEMBER_STATUS");
 	if (redisMemberStatus && (strcmp(redisMemberStatus, "true") == 0)) {
-	    _redisMemberStatus = true;
-		fprintf(stderr, "Using redis for member status\n");
+		if (_rc != NULL) {
+			_redisMemberStatus = true;
+			fprintf(stderr, "Using redis for member status\n");
+		}
+		else {
+			fprintf(stderr, "ZT_REDIS_MEMBER_STATUS=true ignored: no settings.redis config\n");
+		}
 	}
 
 	auto c = _pool->borrow();
@@ -222,7 +227,7 @@ PostgreSQL::PostgreSQL(const Identity &myId, const char *path, int listenPort, R
 		opts.host = _rc->hostname;
 		opts.port = _rc->port;
 		opts.password = _rc->password;
-		opts.db = 0;
+		opts.db = _rc->clusterMode ? 0 : _rc->db;
 		opts.keep_alive = true;
 		opts.connect_timeout = std::chrono::seconds(3);
 		poolOpts.size = 25;