feat: add project workspaces (DB, API, service, and UI)

New project_workspaces table with primary workspace designation.
Full CRUD routes, service with auto-primary promotion on delete,
workspace management UI in project properties panel, and workspace
data included in project/issue ancestor responses.

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

packages/db/src/migrations/0019_public_victor_mancha.sql

@@ -0,0 +1,18 @@
+CREATE TABLE "project_workspaces" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"company_id" uuid NOT NULL,
+	"project_id" uuid NOT NULL,
+	"name" text NOT NULL,
+	"cwd" text NOT NULL,
+	"repo_url" text,
+	"repo_ref" text,
+	"metadata" jsonb,
+	"is_primary" boolean DEFAULT false NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"updated_at" timestamp with time zone DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "project_workspaces" ADD CONSTRAINT "project_workspaces_company_id_companies_id_fk" FOREIGN KEY ("company_id") REFERENCES "public"."companies"("id") ON DELETE no action ON UPDATE no action;--> statement-breakpoint
+ALTER TABLE "project_workspaces" ADD CONSTRAINT "project_workspaces_project_id_projects_id_fk" FOREIGN KEY ("project_id") REFERENCES "public"."projects"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX "project_workspaces_company_project_idx" ON "project_workspaces" USING btree ("company_id","project_id");--> statement-breakpoint
+CREATE INDEX "project_workspaces_project_primary_idx" ON "project_workspaces" USING btree ("project_id","is_primary");

packages/db/src/migrations/meta/_journal.json

@@ -127,6 +127,20 @@
       "when": 1771883888199,
       "tag": "0017_tiresome_gabe_jones",
       "breakpoints": true
+    },
+    {
+      "idx": 18,
+      "version": "7",
+      "when": 1771897769629,
+      "tag": "0018_flat_sleepwalker",
+      "breakpoints": true
+    },
+    {
+      "idx": 19,
+      "version": "7",
+      "when": 1772029333401,
+      "tag": "0019_public_victor_mancha",
+      "breakpoints": true
     }
   ]
 }