Major refactoring: UUID-based storage, streaming architecture, and CLI improvements

This commit represents a significant architectural overhaul of vaultik:

Database Schema Changes:
- Switch files table to use UUID primary keys instead of path-based keys
- Add UUID primary keys to blobs table for immediate chunk association
- Update all foreign key relationships to use UUIDs
- Add comprehensive schema documentation in DATAMODEL.md
- Add SQLite busy timeout handling for concurrent operations

Streaming and Performance Improvements:
- Implement true streaming blob packing without intermediate storage
- Add streaming chunk processing to reduce memory usage
- Improve progress reporting with real-time metrics
- Add upload metrics tracking in new uploads table

CLI Refactoring:
- Restructure CLI to use subcommands: snapshot create/list/purge/verify
- Add store info command for S3 configuration display
- Add custom duration parser supporting days/weeks/months/years
- Remove old backup.go in favor of enhanced snapshot.go
- Add --cron flag for silent operation

Configuration Changes:
- Remove unused index_prefix configuration option
- Add support for snapshot pruning retention policies
- Improve configuration validation and error messages

Testing Improvements:
- Add comprehensive repository tests with edge cases
- Add cascade delete debugging tests
- Fix concurrent operation tests to use SQLite busy timeout
- Remove tolerance for SQLITE_BUSY errors in tests

Documentation:
- Add MIT LICENSE file
- Update README with new command structure
- Add comprehensive DATAMODEL.md explaining database schema
- Update DESIGN.md with UUID-based architecture

Other Changes:
- Add test-config.yml for testing
- Update Makefile with better test output formatting
- Fix various race conditions in concurrent operations
- Improve error handling throughout

go.mod

@@ -3,19 +3,30 @@ module git.eeqj.de/sneak/vaultik
 go 1.24.4
 
 require (
+	filippo.io/age v1.2.1
+	github.com/aws/aws-sdk-go-v2 v1.36.6
+	github.com/aws/aws-sdk-go-v2/config v1.29.18
+	github.com/aws/aws-sdk-go-v2/credentials v1.17.71
+	github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.17.85
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.84.1
+	github.com/aws/smithy-go v1.22.4
+	github.com/dustin/go-humanize v1.0.1
+	github.com/google/uuid v1.6.0
+	github.com/johannesboyne/gofakes3 v0.0.0-20250603205740-ed9094be7668
+	github.com/jotfs/fastcdc-go v0.2.0
+	github.com/klauspost/compress v1.18.0
+	github.com/spf13/afero v1.14.0
 	github.com/spf13/cobra v1.9.1
+	github.com/stretchr/testify v1.9.0
 	go.uber.org/fx v1.24.0
+	golang.org/x/term v0.33.0
 	gopkg.in/yaml.v3 v3.0.1
 	modernc.org/sqlite v1.38.0
 )
 
 require (
-	filippo.io/age v1.2.1 // indirect
 	github.com/aws/aws-sdk-go v1.44.256 // indirect
-	github.com/aws/aws-sdk-go-v2 v1.36.6 // indirect
 	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.11 // indirect
-	github.com/aws/aws-sdk-go-v2/config v1.29.18 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.17.71 // indirect
 	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.33 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.37 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.37 // indirect
@@ -25,42 +36,24 @@ require (
 	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.7.5 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.12.18 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.18.18 // indirect
-	github.com/aws/aws-sdk-go-v2/service/s3 v1.84.1 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sso v1.25.6 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.30.4 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sts v1.34.1 // indirect
-	github.com/aws/smithy-go v1.22.4 // indirect
-	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/go-ini/ini v1.67.0 // indirect
-	github.com/goccy/go-json v0.10.5 // indirect
-	github.com/google/uuid v1.6.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/johannesboyne/gofakes3 v0.0.0-20250603205740-ed9094be7668 // indirect
-	github.com/jotfs/fastcdc-go v0.2.0 // indirect
-	github.com/klauspost/compress v1.18.0 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.10 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/minio/crc64nvme v1.0.1 // indirect
-	github.com/minio/md5-simd v1.1.2 // indirect
-	github.com/minio/minio-go/v7 v7.0.94 // indirect
 	github.com/ncruces/go-strftime v0.1.9 // indirect
-	github.com/philhofer/fwd v1.1.3-0.20240916144458-20a13a1f6b7c // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
-	github.com/rs/xid v1.6.0 // indirect
 	github.com/ryszard/goskiplist v0.0.0-20150312221310-2dfbae5fcf46 // indirect
-	github.com/spf13/afero v1.14.0 // indirect
 	github.com/spf13/pflag v1.0.6 // indirect
-	github.com/tinylib/msgp v1.3.0 // indirect
-	github.com/zeebo/blake3 v0.2.4 // indirect
 	go.shabbyrobe.org/gocovmerge v0.0.0-20230507111327-fa4f82cfbf4d // indirect
 	go.uber.org/dig v1.19.0 // indirect
 	go.uber.org/multierr v1.10.0 // indirect
 	go.uber.org/zap v1.26.0 // indirect
 	golang.org/x/crypto v0.38.0 // indirect
 	golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0 // indirect
-	golang.org/x/net v0.40.0 // indirect
 	golang.org/x/sys v0.34.0 // indirect
-	golang.org/x/term v0.33.0 // indirect
 	golang.org/x/text v0.25.0 // indirect
 	golang.org/x/tools v0.33.0 // indirect
 	modernc.org/libc v1.65.10 // indirect