Update documentation and project configuration

- Add architecture documentation for versioned snapshots
- Update Makefile with improved build commands
- Update dependency versions in go.mod
- Add project notes and development guidelines
- Improve README with new features and instructions

go.mod

@@ -1,15 +1,14 @@
 module gemini-grc
 
-go 1.23.1
+go 1.24.3
 
 require (
-	github.com/antanst/go_errors v0.0.1
+	git.antanst.com/antanst/uid v0.0.1
+	git.antanst.com/antanst/xerrors v0.0.1
 	github.com/guregu/null/v5 v5.0.0
 	github.com/jackc/pgx/v5 v5.7.2
 	github.com/jmoiron/sqlx v1.4.0
 	github.com/lib/pq v1.10.9
-	github.com/matoous/go-nanoid/v2 v2.1.0
-	github.com/rs/zerolog v1.33.0
 	github.com/stretchr/testify v1.9.0
 	golang.org/x/text v0.21.0
 )
@@ -20,12 +19,13 @@ require (
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jackc/puddle/v2 v2.2.2 // indirect
 	github.com/kr/text v0.2.0 // indirect
-	github.com/mattn/go-colorable v0.1.14 // indirect
-	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rogpeppe/go-internal v1.13.1 // indirect
 	golang.org/x/crypto v0.32.0 // indirect
 	golang.org/x/sync v0.10.0 // indirect
-	golang.org/x/sys v0.29.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
+
+replace git.antanst.com/antanst/xerrors => ../xerrors
+
+replace git.antanst.com/antanst/uid => ../uid