graph/db: private taproot V1→V2 channel migration

.github/workflows/pr-severity.yml

@@ -31,11 +31,19 @@ jobs:
         with:
           fetch-depth: 1
 
+      - name: Setup Bun
+        id: setup-bun
+        uses: oven-sh/setup-bun@3d267786b128fe76c2f16a390aa2448b815359f3
+        with:
+          bun-version: 1.3.6
+          token: ''
+
       - name: Classify PR with Claude
         uses: anthropics/claude-code-action@v1
         with:
           claude_code_oauth_token: ${{ secrets.CLAUDE_CODE_OAUTH_TOKEN }}
-          github_token: ${{ secrets.PR_SEVERITY_BOT_TOKEN }}
+          github_token: ${{ github.token }}
+          path_to_bun_executable: ${{ steps.setup-bun.outputs.bun-path }}
 
           # Allow any user since this workflow only reads PR metadata via API
           # and doesn't execute any code from the PR. Tool permissions are

config_builder.go

@@ -82,6 +82,11 @@
 	// paymentMigration is the version number for the payments migration
 	// that migrates KV payments to the native SQL schema.
 	paymentMigration = 14
+
+	// taprootV2Migration is the version number for the migration that
+	// converts private taproot channels from V1 workaround storage to
+	// canonical V2 storage.
+	taprootV2Migration = 17
 )
 
 // GrpcRegistrar is an interface that must be satisfied by an external subserver
@@ -1209,6 +1214,20 @@
 
 					continue
 
+				case taprootV2Migration:
+					if !d.cfg.Dev.GetSkipTaprootV2Migration() { //nolint:ll
+						taprootMig := func(
+							tx *sqlc.Queries,
+						) error {
+							return graphdb.MigratePrivateTaprootToV2( //nolint:ll
+								ctx, tx,
+							)
+						}
+						migrations[i].MigrationFn = taprootMig //nolint:ll
+					}
+
+					continue
+
 				default:
 				}
 

docs/release-notes/release-notes-0.21.0.md

@@ -275,6 +275,12 @@
     [4](https://github.com/lightningnetwork/lnd/pull/10542),
     [5](https://github.com/lightningnetwork/lnd/pull/10572),
     [6](https://github.com/lightningnetwork/lnd/pull/10582).
+* [Migrate private taproot channels in the SQL graph backend from the legacy
+  V1 workaround to canonical V2 storage](https://github.com/lightningnetwork/lnd/pull/10676).
+  Existing private taproot channels stored as V1 gossip objects with taproot
+  staging bits are rewritten as V2 channel rows, while a temporary `SQLStore`
+  shim keeps V1 graph callers and policy updates working until full gossip V2
+  support lands.
 * Updated waiting proof persistence for gossip upgrades by introducing typed
   waiting proof keys and payloads, with a DB migration to rewrite legacy
   waiting proof records to the new key/value format