Add custom logger with source location tracking and remove verbose database logs

- Create internal/logger package with Logger wrapper around slog
- Logger automatically adds source file, line number, and function name to all log entries
- Use golang.org/x/term to properly detect if stdout is a terminal
- Replace all slog.Logger usage with logger.Logger throughout the codebase
- Remove verbose logging from database GetStats() method
- Update all constructors and dependencies to use the new logger

internal/streamer/streamer.go

@@ -7,13 +7,13 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"log/slog"
 	"net/http"
 	"os"
 	"sync"
 	"sync/atomic"
 	"time"
 
+	"git.eeqj.de/sneak/routewatch/internal/logger"
 	"git.eeqj.de/sneak/routewatch/internal/metrics"
 	"git.eeqj.de/sneak/routewatch/internal/ristypes"
 )
@@ -63,7 +63,7 @@ type handlerInfo struct {
 
 // Streamer handles streaming BGP updates from RIS Live
 type Streamer struct {
-	logger       *slog.Logger
+	logger       *logger.Logger
 	client       *http.Client
 	handlers     []*handlerInfo
 	rawHandler   RawMessageHandler
@@ -75,7 +75,7 @@ type Streamer struct {
 }
 
 // New creates a new RIS streamer
-func New(logger *slog.Logger, metrics *metrics.Tracker) *Streamer {
+func New(logger *logger.Logger, metrics *metrics.Tracker) *Streamer {
 	return &Streamer{
 		logger: logger,
 		client: &http.Client{

internal/streamer/streamer_test.go

@@ -3,12 +3,12 @@ package streamer
 import (
 	"testing"
 
+	"git.eeqj.de/sneak/routewatch/internal/logger"
 	"git.eeqj.de/sneak/routewatch/internal/metrics"
-	"log/slog"
 )
 
 func TestNewStreamer(t *testing.T) {
-	logger := slog.Default()
+	logger := logger.New()
 	metricsTracker := metrics.New()
 	s := New(logger, metricsTracker)