feat: add session.identityLinks for cross-platform DM session linking (#1033)

Co-authored-by: Shadow <shadow@clawd.bot>

src/config/schema.ts

@@ -337,6 +337,8 @@ const FIELD_HELP: Record<string, string> = {
   "commands.useAccessGroups": "Enforce access-group allowlists/policies for commands.",
   "session.dmScope":
     'DM session scoping: "main" keeps continuity; "per-peer" or "per-channel-peer" isolates DM history (recommended for shared inboxes).',
+  "session.identityLinks":
+    "Map canonical identities to provider-prefixed peer IDs for DM session linking (example: telegram:123456).",
   "channels.telegram.configWrites":
     "Allow Telegram to write config in response to channel events/commands (default: true).",
   "channels.slack.configWrites":

src/config/types.base.ts

@@ -57,6 +57,8 @@ export type SessionConfig = {
   scope?: SessionScope;
   /** DM session scoping (default: "main"). */
   dmScope?: DmScope;
+  /** Map platform-prefixed identities (e.g. "telegram:123") to canonical DM peers. */
+  identityLinks?: Record<string, string[]>;
   resetTriggers?: string[];
   idleMinutes?: number;
   heartbeatIdleMinutes?: number;

src/config/zod-schema.session.ts

@@ -13,6 +13,7 @@ export const SessionSchema = z
     dmScope: z
       .union([z.literal("main"), z.literal("per-peer"), z.literal("per-channel-peer")])
       .optional(),
+    identityLinks: z.record(z.string(), z.array(z.string())).optional(),
     resetTriggers: z.array(z.string()).optional(),
     idleMinutes: z.number().int().positive().optional(),
     heartbeatIdleMinutes: z.number().int().positive().optional(),