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feat(PROJ-36,PROJ-37): gzip-Kompression + Attachment-Deduplication

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Sprint 1: Emails werden vor AES-256-GCM optional gzip-komprimiert (compress: true).
Magic-Byte 0x01 als Prefix ermöglicht backward-kompatibles Load() für Legacy-Dateien.
Neue DB-Tabelle storage_objects trackt Kompressions-Metadaten.

Sprint 2: Attachments werden via SHA-256 dedupliziert — gleicher Anhang in N Mails
wird nur einmal gespeichert. Neue Tabellen: attachments, email_attachments.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
sysops
2026-04-05 01:19:51 +02:00
parent fdb25cb16a
commit 27d45f58e8
10 changed files with 279 additions and 45 deletions
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config/config.go
+1 -1
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@@ -63,9 +63,9 @@ type SMTPOutConfig struct {
type StorageConfig struct {
StorePath string `yaml:"store_path"`
AStorePath string `yaml:"astore_path"`
XapianPath string `yaml:"xapian_path"`
Keyfile string `yaml:"keyfile"`
RetentionDays int `yaml:"retention_days"` // 0 = kein Lock (GoBD-Compliance: z.B. 3650 für 10 Jahre)
Compress bool `yaml:"compress"` // gzip-Kompression vor AES-256-GCM (spart ~40-60% Disk)
}
// DatabaseConfig holds PostgreSQL connection settings.