refactor: move internal packages to internal/ directory

  - Move implementation packages (destructure, enrichers, filters, formatters, parser, handler) to internal/
  - Update all import paths across the codebase
  - Fix Splunk integration tests by exposing port 8089 and using non-default password
  - Update docker-compose.test.yml with correct Splunk configuration
  - Update testing documentation to reflect actual requirements

Author: willibrandon

benchmark_alloc_test.go

@@ -5,7 +5,7 @@ import (
 	"testing"
 
 	"github.com/willibrandon/mtlog/core"
-	"github.com/willibrandon/mtlog/parser"
+	"github.com/willibrandon/mtlog/internal/parser"
 )
 
 // Let's break down where allocations happen

configuration/builder.go

@@ -8,8 +8,8 @@ import (
 
 	"github.com/willibrandon/mtlog"
 	"github.com/willibrandon/mtlog/core"
-	"github.com/willibrandon/mtlog/enrichers"
-	"github.com/willibrandon/mtlog/filters"
+	"github.com/willibrandon/mtlog/internal/enrichers"
+	"github.com/willibrandon/mtlog/internal/filters"
 	"github.com/willibrandon/mtlog/sinks"
 )
 

convenience.go

@@ -2,9 +2,9 @@ package mtlog
 
 import (
 	"github.com/willibrandon/mtlog/core"
-	"github.com/willibrandon/mtlog/destructure"
-	"github.com/willibrandon/mtlog/enrichers"
-	"github.com/willibrandon/mtlog/filters"
+	"github.com/willibrandon/mtlog/internal/destructure"
+	"github.com/willibrandon/mtlog/internal/enrichers"
+	"github.com/willibrandon/mtlog/internal/filters"
 	"github.com/willibrandon/mtlog/sinks"
 )
 

docker/docker-compose.test.yml

@@ -23,8 +23,8 @@ services:
     container_name: splunk-test
     environment:
       - SPLUNK_START_ARGS=--accept-license
-      - SPLUNK_PASSWORD=changeme
-      - SPLUNK_HEC_TOKEN=00000000-0000-0000-0000-000000000000
+      - SPLUNK_PASSWORD=Admin123!
+      - SPLUNK_HEC_TOKEN=eb6baeef-eeb3-4a35-ab73-e17a12523b10
     ports:
       - "8000:8000"
       - "8088:8088"

docs/testing.md

@@ -6,7 +6,7 @@ import (
 
 	"github.com/willibrandon/mtlog"
 	"github.com/willibrandon/mtlog/core"
-	"github.com/willibrandon/mtlog/enrichers"
+	"github.com/willibrandon/mtlog/internal/enrichers"
 )
 
 func main() {

examples/context/main.go

@@ -6,7 +6,7 @@ import (
 
 	"github.com/willibrandon/mtlog"
 	"github.com/willibrandon/mtlog/core"
-	"github.com/willibrandon/mtlog/filters"
+	"github.com/willibrandon/mtlog/internal/filters"
 )
 
 func main() {

examples/filtering/main.go

@@ -7,7 +7,7 @@ import (
 	"time"
 
 	"github.com/willibrandon/mtlog"
-	"github.com/willibrandon/mtlog/enrichers"
+	"github.com/willibrandon/mtlog/internal/enrichers"
 	"github.com/willibrandon/mtlog/sinks"
 )
 

examples/rolling/main.go

@@ -7,7 +7,7 @@ import (
 	"time"
 
 	"github.com/willibrandon/mtlog/core"
-	"github.com/willibrandon/mtlog/parser"
+	"github.com/willibrandon/mtlog/internal/parser"
 	"github.com/willibrandon/mtlog/sinks"
 )
 

format_integration_test.go

@@ -448,7 +448,7 @@ func querySplunkEvents(splunkURL, token, testID string) ([]map[string]interface{
 	}
 	password := os.Getenv("SPLUNK_PASSWORD")
 	if password == "" {
-		password = "changeme"
+		password = "Admin123!"
 	}
 	req.SetBasicAuth(username, password)
 	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")