Link measures to third parties

Add a many-to-many relationship between measures and third parties,
surfaced as a measures tab on the third party detail page and a third
parties tab on the measure detail page. Each side gets a paginated
list with a link/unlink dialog.

Also remove the right-hand drawer on the measure detail page and
expose the state as a badge in the page header, mirroring how the
compliance page surfaces its active flag.

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/coredata/migrations/20260522T120000Z.sql

@@ -0,0 +1,22 @@
+-- Copyright (c) 2025-2026 Probo Inc <hello@getprobo.com>.
+--
+-- Permission to use, copy, modify, and/or distribute this software for any
+-- purpose with or without fee is hereby granted, provided that the above
+-- copyright notice and this permission notice appear in all copies.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+-- REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+-- AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+-- INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+-- LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+-- OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+-- PERFORMANCE OF THIS SOFTWARE.
+
+CREATE TABLE measures_third_parties (
+    measure_id TEXT NOT NULL REFERENCES measures(id) ON DELETE CASCADE,
+    third_party_id TEXT NOT NULL REFERENCES third_parties(id) ON DELETE CASCADE,
+    organization_id TEXT NOT NULL,
+    tenant_id TEXT NOT NULL,
+    created_at TIMESTAMP WITH TIME ZONE NOT NULL,
+    PRIMARY KEY (measure_id, third_party_id)
+);