Add substring ID matching for all bd commands

- Enhanced ResolvePartialID to handle:
  - Bare hashes: 07b8c8 → bd-07b8c8
  - Prefix without hyphen: bd07b8c8 → bd-07b8c8
  - Full IDs: bd-07b8c8 (unchanged)
  - Substring matching: 07b → finds bd-07b8c8

- Added RPC support:
  - New OpResolveID operation
  - handleResolveID server handler
  - ResolveID client method

- Updated all commands to resolve IDs:
  - show, update, close, reopen
  - dep (add, remove, tree)
  - label (add, remove, list)

- Works in both daemon and direct modes

Fixes bd-0591c3

internal/rpc/protocol.go

@@ -25,6 +25,7 @@ const (
 	OpCommentList     = "comment_list"
 	OpCommentAdd      = "comment_add"
 	OpBatch           = "batch"
+	OpResolveID       = "resolve_id"
 
 	OpCompact         = "compact"
 	OpCompactStats    = "compact_stats"
@@ -104,6 +105,11 @@ type ShowArgs struct {
 	ID string `json:"id"`
 }
 
+// ResolveIDArgs represents arguments for the resolve_id operation
+type ResolveIDArgs struct {
+	ID string `json:"id"`
+}
+
 // ReadyArgs represents arguments for the ready operation
 type ReadyArgs struct {
 	Assignee   string `json:"assignee,omitempty"`