Promote AgentCompany-New to the repository root and retire the old app

The legacy application - its src, tests, landing site, promo assets, docs,
release tooling, CI workflows, and root configs - leaves the tree; it stays
reachable in history. Everything under AgentCompany-New moves up unchanged:
same package name, so the production userData/database path is untouched,
and e2e/build scripts already resolved paths relative to the project. The
developer cred.txt stays gitignored at its new location. Full verify:ci
passes from the new root.

src/main/database/migrations/002-collaboration.ts

@@ -0,0 +1,117 @@
+export const collaborationProviderPolicySchema = `
+  create table if not exists skill_dependencies (
+    revision_id text not null references skill_revisions(id) on delete cascade,
+    depends_on_revision_id text not null references skill_revisions(id) on delete cascade,
+    dependency_kind text not null,
+    optional integer not null,
+    primary key (revision_id, depends_on_revision_id)
+  );
+
+  create table if not exists skill_runtime_snapshots (
+    id text primary key,
+    agent_id text not null references agents(id) on delete cascade,
+    run_id text not null,
+    compiled_prompt text not null,
+    tools_manifest text not null,
+    source_revision_ids text not null,
+    created_at text not null
+  );
+
+  create table if not exists skill_catalog_tags (
+    skill_id text not null references skill_definitions(id) on delete cascade,
+    tag text not null,
+    tag_type text not null,
+    primary key (skill_id, tag, tag_type)
+  );
+
+  create table if not exists chat_threads (
+    id text primary key,
+    org_id text not null references organizations(id) on delete cascade,
+    space_id text not null references chat_spaces(id) on delete cascade,
+    root_message_id text references chat_messages(id) on delete set null,
+    title text not null,
+    state text not null,
+    created_at text not null,
+    updated_at text not null
+  );
+
+  create table if not exists chat_mentions (
+    message_id text not null references chat_messages(id) on delete cascade,
+    target_type text not null,
+    target_id text not null,
+    offset_start integer not null,
+    offset_end integer not null
+  );
+
+  create table if not exists chat_attachments (
+    message_id text not null references chat_messages(id) on delete cascade,
+    file_id text not null references file_objects(id) on delete cascade,
+    transfer_type text not null,
+    checksum text not null,
+    preview_key text
+  );
+
+  create table if not exists chat_presence (
+    principal_type text not null,
+    principal_id text not null,
+    status text not null,
+    status_text text not null,
+    last_seen_at text not null,
+    primary key (principal_type, principal_id)
+  );
+
+  create table if not exists chat_slash_invocations (
+    id text primary key,
+    message_id text not null references chat_messages(id) on delete cascade,
+    command text not null,
+    args_json text not null,
+    result_ref text,
+    created_at text not null
+  );
+
+  create table if not exists provider_requests (
+    id text primary key,
+    org_id text not null references organizations(id) on delete cascade,
+    provider_id text not null references providers(id) on delete cascade,
+    provider_key text not null,
+    model text not null,
+    prompt_sha256 text not null,
+    response_text text,
+    raw_response_json text,
+    state text not null,
+    error_message text,
+    created_at text not null,
+    completed_at text
+  );
+
+  create table if not exists policy_rules (
+    id text primary key,
+    org_id text not null references organizations(id) on delete cascade,
+    subject_type text not null,
+    subject_id text,
+    action text not null,
+    effect text not null,
+    risk_ceiling text not null,
+    created_at text not null
+  );
+
+  create index if not exists idx_provider_requests_org_created on provider_requests(org_id, created_at);
+  create index if not exists idx_chat_threads_space_updated on chat_threads(space_id, updated_at);
+  insert into policy_rules(id, org_id, subject_type, subject_id, action, effect, risk_ceiling, created_at)
+  select
+    'pol_' || lower(hex(randomblob(16))),
+    id,
+    'organization',
+    id,
+    'task_create',
+    'require_approval',
+    'medium',
+    datetime('now')
+  from organizations
+  where not exists (
+    select 1 from policy_rules
+    where policy_rules.org_id = organizations.id and policy_rules.action = 'task_create'
+  );
+  insert into schema_migrations(version, name, applied_at)
+  values (2, 'collaboration_provider_policy_schema', datetime('now'));
+`;