Re-vendor the shared files from sneak/prompts at 0653579 (closes #52)

Takes .golangci.yml, .dockerignore, .gitignore, .editorconfig, the
workflow and REPO_POLICIES.md from sneak/prompts 0653579, with this
repository's own entries after the shared content. Lint (golangci-lint
v2.14.0) and test are Dockerfile phases that script/lint and script/test
build alone with a new CACHEBUST value, keeping Go's and golangci-lint's
caches; the image build depends on both. make fmt and make fmt-check also
format the markdown with prettier, pinned in yarn.lock. The agent
guidance moves to AGENTS.md. The Go code is fixed for what the new
configuration finds, and the AS and prefix detail reads now return the
rows' error after their loops.

Model: opus-5-5

internal/metrics/metrics.go

@@ -64,6 +64,7 @@ func New() *Tracker {
 // first counts one reconnect.
 func (t *Tracker) SetConnected(connected bool) {
 	t.isConnected.Store(connected)
+
 	if !connected {
 		return
 	}
@@ -120,9 +121,11 @@ func (t *Tracker) GetStreamMetrics() StreamMetrics {
 	if msgCount >= 0 {
 		totalMessages = uint64(msgCount)
 	}
+
 	if byteCount >= 0 {
 		totalBytes = uint64(byteCount)
 	}
+
 	if wireByteCount >= 0 {
 		totalWireBytes = uint64(wireByteCount)
 	}
@@ -166,7 +169,7 @@ func (t *Tracker) RecordWithdrawal() {
 func (t *Tracker) SetBGPPeerCount(count int) {
 	// BGP peer count is always small (< 1000), so int32 is safe
 	if count > 0 && count < 1<<31 {
-		t.bgpPeerCount.Store(int32(count)) //nolint:gosec // count is validated
+		t.bgpPeerCount.Store(int32(count))
 	}
 }
 
@@ -214,7 +217,8 @@ type StreamMetrics struct {
 	TotalMessages uint64
 	// TotalBytes is the total number of decompressed bytes received since startup
 	TotalBytes uint64
-	// TotalWireBytes is the total number of bytes received on the wire (before decompression)
+	// TotalWireBytes is the total number of bytes received on the wire (before
+	// decompression)
 	TotalWireBytes uint64
 	// ConnectedSince is the time when the current connection was established
 	ConnectedSince time.Time
@@ -222,9 +226,11 @@ type StreamMetrics struct {
 	Connected bool
 	// MessagesPerSec is the rate of messages received per second (1-minute average)
 	MessagesPerSec float64
-	// BitsPerSec is the rate of decompressed bits received per second (1-minute average)
+	// BitsPerSec is the rate of decompressed bits received per second (1-minute
+	// average)
 	BitsPerSec float64
-	// WireBitsPerSec is the rate of bits received on the wire per second (1-minute average)
+	// WireBitsPerSec is the rate of bits received on the wire per second
+	// (1-minute average)
 	WireBitsPerSec float64
 	// ReconnectCount is the number of reconnections since startup
 	ReconnectCount uint64

internal/metrics/metrics_test.go

@@ -1,12 +1,18 @@
-package metrics
+package metrics_test
 
-import "testing"
+import (
+	"testing"
+
+	"git.eeqj.de/sneak/routewatch/internal/metrics"
+)
 
 // TestReconnectCount connects three times with a disconnect between each, the
 // way the streamer does, and expects every connection after the first to count
 // one reconnect.
 func TestReconnectCount(t *testing.T) {
-	tracker := New()
+	t.Parallel()
+
+	tracker := metrics.New()
 
 	tracker.SetConnected(true)
 	tracker.SetConnected(false)