docs: AGENTS.md repoint to KNEL repos + stale-ref fixes [#769]

Completes dba54b2 (which staged deletions only — pathspec'd add missed
the content edits). Layout table, Key Scripts, DNS discipline, conman
section now point at KNEL/netinfra|facilities|perf|monitoring|inventory;
conman example switched from IP literal to pfv-tsys4 (DNS-names rule).

https://projects.knownelement.com/issues/769#note-4152

scripts/audit-fleet.sh

@@ -19,7 +19,7 @@ set -uo pipefail
 
 REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 REMOTE="$REPO_ROOT/tests/remote.sh"
-REMOTE_DNS="$REPO_ROOT/netinfra/dns-cluster-setup/remote-dns.sh"
+REMOTE_DNS="$HOME/projects/KNEL/netinfra/dns-cluster-setup/remote-dns.sh"  # moved to KNEL/netinfra [#769]
 DNS_SUFFIX="knel.net"
 DNS_SERVER="pfv-netinfra-01.knel.net"
 PROX_NODES=(pfv-tsys1 pfv-tsys3 pfv-tsys4 pfv-tsys5 pfv-tsys6 pfv-tsys7 pfv-tsys9)

scripts/check-rules.sh

@@ -41,7 +41,7 @@ TODAY="$(date +%Y-%m-%d)"
 #    Runs in Docker so the host stays clean (no native shellcheck required).
 # ----------------------------------------------------------------------------
 $RULE_VERBOSE && log_step "Shell scripts (shellcheck)"
-mapfile -d '' SH_FILES < <(find . -path ./.git -prune -o -path ./.tmp -prune -o -path ./.crush -prune -o -path ./vendor -prune -o -path ./oam/librenms-agent/agent -prune -o -path ./archive -prune -o -path ./node_modules -prune -o \( -name '*.sh' -o -name '*.bash' \) -print0 2>/dev/null)
+mapfile -d '' SH_FILES < <(find . -path ./.git -prune -o -path ./.tmp -prune -o -path ./.crush -prune -o -path ./vendor -prune -o -path ./archive -prune -o -path ./node_modules -prune -o \( -name '*.sh' -o -name '*.bash' \) -print0 2>/dev/null)
 if [ "${#SH_FILES[@]}" -gt 0 ]; then
     if have shellcheck; then
         if shellcheck "${SH_FILES[@]}" >/dev/null 2>&1; then