refactor: remove unused bd pin/unpin/hook commands (bd-x0zl)

Analysis found these commands are dead code:
- gt never calls `bd pin` - uses `bd update --status=pinned` instead
- Beads.Pin() wrapper exists but is never called
- bd hook functionality duplicated by gt mol status
- Code comment says "pinned field is cosmetic for bd hook visibility"

Removed:
- cmd/bd/pin.go
- cmd/bd/unpin.go
- cmd/bd/hook.go

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

integrations/beads-mcp/src/beads_mcp/bd_daemon_client.py

@@ -11,6 +11,7 @@ from .bd_client import BdClientBase, BdError
 from .models import (
     AddDependencyParams,
     BlockedIssue,
+    BlockedParams,
     CloseIssueParams,
     CreateIssueParams,
     InitParams,
@@ -432,6 +433,9 @@ class BdDaemonClient(BdClientBase):
             args["sort_policy"] = params.sort_policy
         if params.limit:
             args["limit"] = params.limit
+        # Parent filtering (descendants of a bead/epic)
+        if params.parent_id:
+            args["parent_id"] = params.parent_id
 
         data = await self._send_request("ready", args)
         issues_data = json.loads(data) if isinstance(data, str) else data
@@ -451,18 +455,25 @@ class BdDaemonClient(BdClientBase):
             stats_data = {}
         return Stats(**stats_data)
 
-    async def blocked(self) -> List[BlockedIssue]:
+    async def blocked(self, params: Optional[BlockedParams] = None) -> List[BlockedIssue]:
         """Get blocked issues.
 
+        Args:
+            params: Query parameters (optional)
+
         Returns:
             List of blocked issues with their blockers
-
-        Note:
-            This operation may not be implemented in daemon RPC yet
         """
-        # Note: blocked operation may not be in RPC protocol yet
-        # This is a placeholder for when it's added
-        raise NotImplementedError("Blocked operation not yet supported via daemon")
+        params = params or BlockedParams()
+        args: Dict[str, Any] = {}
+        if params.parent_id:
+            args["parent_id"] = params.parent_id
+
+        data = await self._send_request("blocked", args)
+        issues_data = json.loads(data) if isinstance(data, str) else data
+        if issues_data is None:
+            return []
+        return [BlockedIssue(**issue) for issue in issues_data]
 
     async def inspect_migration(self) -> dict[str, Any]:
         """Get migration plan and database state for agent analysis.