feat(db): add team column to ticket system

Adds a comma-separated team field to tickets so work can be
attributed to server, client, or joint teams. Includes --team
filter on list, --team on create, and a new team subcommand.
Schema, CLI, and skill docs all updated.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/skills/ticket/SKILL.md

@@ -34,7 +34,7 @@ For raw SQL access (rare), use the wrapper scripts:
 
 ### List tickets
 ```bash
-db/connectors/ticket list [--status S] [--priority P] [--epic N] [--sprint N] [--assigned A]
+db/connectors/ticket list [--status S] [--priority P] [--epic N] [--sprint N] [--assigned A] [--team T]
 ```
 
 ### Show ticket detail
@@ -45,7 +45,7 @@ Returns full ticket with children, blockers, and dependents.
 
 ### Create ticket
 ```bash
-db/connectors/ticket create <type> <title> [--parent N] [--priority P] [--decision D]
+db/connectors/ticket create <type> <title> [--parent N] [--priority P] [--decision D] [--team T]
 ```
 Types: `initiative`, `epic`, `story`, `task`, `bug`
 Priorities: `critical`, `high`, `medium`, `low`
@@ -63,6 +63,12 @@ db/connectors/ticket assign <id> <agent>
 db/connectors/ticket unassign <id>
 ```
 
+### Team assignment
+```bash
+db/connectors/ticket team <id> <teams>
+```
+Teams are comma-separated, e.g. `server`, `client`, `server,client`.
+
 ### Sprint management
 ```bash
 db/connectors/ticket sprint [--active]