chore: rename Go module path gitea.d-ma.be → git.d-ma.be

Infra ADR-0004 renamed the Gitea host. Bulk replace across go.mod and
all .go import paths. Build and tests pass unchanged.

Closes #20

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Dt6aHEDWRjkK14Voi6HnGh

internal/adapters/summarizer/summarizer.go

@@ -18,8 +18,8 @@ import (
 	"time"
 	"unicode/utf8"
 
-	"gitea.d-ma.be/mathias/tapir/internal/domain"
-	"gitea.d-ma.be/mathias/tapir/internal/metrics"
+	"git.d-ma.be/mathias/tapir/internal/domain"
+	"git.d-ma.be/mathias/tapir/internal/metrics"
 )
 
 // Completer is the minimal LLM chat surface the Summarizer needs.

internal/adapters/summarizer/summarizer_test.go

@@ -12,9 +12,9 @@ import (
 	"strings"
 	"testing"
 
-	"gitea.d-ma.be/mathias/tapir/internal/domain"
-	"gitea.d-ma.be/mathias/tapir/internal/metrics"
-	"gitea.d-ma.be/mathias/tapir/internal/ports"
+	"git.d-ma.be/mathias/tapir/internal/domain"
+	"git.d-ma.be/mathias/tapir/internal/metrics"
+	"git.d-ma.be/mathias/tapir/internal/ports"
 )
 
 // TestSummarizerRecordsMetric verifies the summarizer→metrics wiring (ADR-030)