Add finding and obligation publish to document system

Replace the old snapshot-based approach with the new publish document
system for findings and obligations. Includes GraphQL mutations, MCP
tools, CLI commands, e2e tests, frontend publish dialogs, and
snapshot-to-document migration tools.

Remove snapshot mode entirely from findings and obligations: drop
snapshotId from GraphQL schemas, filters, resolvers, MCP spec, frontend
routes, pages, and helpers. The snapshot_id column remains in the
database but is now filtered out with snapshot_id IS NULL.

Remove auditor's ability to publish SoA.

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

pkg/coredata/migrations/20260422T130000Z.sql

@@ -0,0 +1,17 @@
+-- Copyright (c) 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.
+
+ALTER TABLE generated_documents
+    ADD COLUMN findings_document_id TEXT REFERENCES documents(id) ON DELETE SET NULL,
+    ADD COLUMN obligations_document_id TEXT REFERENCES documents(id) ON DELETE SET NULL;