Add RPC infrastructure and updated database

- RPC Phase 1: Protocol, server, client implementation
- Updated renumber.go with proper text reference updates (3-phase approach)
- Clean database exported: 344 issues (bd-1 to bd-344)
- Added DAEMON_DESIGN.md documentation
- Updated go.mod/go.sum for RPC dependencies

Amp-Thread-ID: https://ampcode.com/threads/T-456af77c-8b7f-4004-9027-c37b95e10ea5
Co-authored-by: Amp <amp@ampcode.com>

go.mod

@@ -3,13 +3,14 @@ module github.com/steveyegge/beads
 go 1.23.0
 
 require (
+	github.com/anthropics/anthropic-sdk-go v1.14.0
 	github.com/fatih/color v1.18.0
 	github.com/spf13/cobra v1.10.1
 	modernc.org/sqlite v1.38.2
+	rsc.io/script v0.0.2
 )
 
 require (
-	github.com/anthropics/anthropic-sdk-go v1.14.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
@@ -28,5 +29,4 @@ require (
 	modernc.org/libc v1.66.3 // indirect
 	modernc.org/mathutil v1.7.1 // indirect
 	modernc.org/memory v1.11.0 // indirect
-	rsc.io/script v0.0.2 // indirect
 )