v0.10.0: ports and adapters refactor

- Extract shared manifest types into internal/manifest/types leaf package.
- Extract SQLite adapter into internal/manifest/sqlite.
- Extract JSONL adapter into internal/manifest/jsonl.
- Isolate modernc.org/sqlite import to sqlite/adapter.go.
- Add adapter-backed registry with manifest.Default.
- Adapter-agnostic ConvertManifest in types/.
- MemoryAdapter for in-memory manifest testing.
- CLI uses manifest.Default registry directly.
- SQLite LogWriter type assertion moved into SQLiteAdapter.
- Manifest interface includes Entries(); EntryReader removed.
- No behavior changes. 100% coverage across all 6 packages.

internal/manifest/jsonl/adapter.go

@@ -0,0 +1,17 @@
+package jsonl
+
+import (
+	"gitea.k3s.k0.nu/tools/photocli/internal/manifest/types"
+)
+
+type Adapter struct{}
+
+func (Adapter) Format() types.Format                    { return types.FormatJSONL }
+func (Adapter) Aliases() []string                       { return []string{"json"} }
+func (Adapter) Path(dir string) string                  { return Path(dir) }
+func (Adapter) Exists(dir string) bool                  { return FileExists(Path(dir)) }
+func (Adapter) Open(dir string) (types.Manifest, error) { return Load(dir), nil }
+
+func (Adapter) OpenLogWriter(_ types.Manifest, dir string) (types.LogWriter, error) {
+	return types.NewFileLogWriter(types.LogPath(dir))
+}