feat: publish Tend v0.2 Preview 2 source

Export the reviewed allowlisted snapshot from private source commit 8aab3db43f35e6a49aa497f45d73701b13fc9f32 and tree 992132ea4703437dc13ffdbb04a077816c02caf9. This includes routed singleton continuity, deployment evidence, strict schema-2 configuration, restricted transport, and the independently compilable public-tree guard.

AI-Assisted: OpenAI Codex
Signed-off-by: Cole Speelman <crspeelman@gmail.com>

scripts/public-snapshot.allow

@@ -8,6 +8,7 @@ SECURITY.md
 cmd/tend/main.go
 docs/ARCHITECTURE.md
 docs/DOGFOOD_EVIDENCE.md
+docs/DOGFOOD_FRICTION.md
 docs/PUBLIC_SNAPSHOT.md
 docs/SCHEMA_V2_MIGRATION.md
 docs/THREAT_MODEL.md
@@ -19,6 +20,8 @@ examples/blue-green/example-site@.service
 examples/blue-green/tend.json
 examples/local/.env.example
 examples/server/authorized_keys.example
+examples/server/caddy/docs-site.template
+examples/server/caddy/example-site.template
 examples/server/environment/docs-site.env.example
 examples/server/environment/example-site.env.example
 examples/server/example-singleton.service
@@ -28,6 +31,7 @@ examples/server/services/example-site.json
 examples/server/slots/example-site-blue.env
 examples/server/slots/example-site-green.env
 examples/server/tend-receive.sudoers
+examples/singleton/caddy-handler.template
 examples/singleton/tend.json
 go.mod
 internal/config/config.go
@@ -42,7 +46,10 @@ internal/deploy/operator_test.go
 internal/deploy/ownership_linux.go
 internal/deploy/ownership_other.go
 internal/deploy/release.go
+internal/deploy/release_mode_linux_test.go
 internal/deploy/release_test.go
+internal/eventlog/eventlog.go
+internal/eventlog/eventlog_test.go
 internal/packager/packager.go
 internal/packager/packager_test.go
 internal/process/run.go
@@ -62,6 +69,7 @@ internal/version/version.go
 internal/version/version_test.go
 release/tend.json
 scripts/check-licenses.sh
+scripts/check-public-tree.sh
 scripts/export-public.sh
 scripts/public-snapshot.allow
 scripts/test-public-snapshot.sh