feat: git-based agent version reference and unified outdated badge (0.20.0)

SAC reads latest RDP/ssh-monitor versions from configured git repos for outdated detection, update targets, and settings test-git.

backend/app/api/v1/hosts.py

@@ -10,7 +10,11 @@ from app.config import get_settings
 from app.database import get_db
 from app.models import Event, Host
 from app.schemas.list_models import HostDetail, HostListResponse, HostSummary
-from app.services.agent_version import latest_agent_versions_by_product
+from app.services.agent_version import (
+    latest_agent_versions_by_product,
+    reference_agent_versions_by_product,
+)
+from app.services.agent_git_release import get_git_release_versions
 from app.services.agent_update import (
     AgentUpdateNotAllowedError,
     execute_agent_update_fallback,
@@ -92,6 +96,12 @@ def list_hosts(
     report_map = max_daily_report_time_by_host(db)
     latest_map = latest_agent_versions_by_product(db)
     update_cfg = get_effective_agent_update_config(db)
+    git_release = get_git_release_versions(update_cfg, db=db)
+    reference_map = reference_agent_versions_by_product(
+        update_cfg,
+        latest_map,
+        git_versions=git_release.versions,
+    )
 
     items: list[HostSummary] = []
     for host in rows:
@@ -117,7 +127,12 @@ def list_hosts(
                 agent_status=compute_agent_status(
                     last_hb, stale_minutes=settings.sac_heartbeat_stale_minutes
                 ),
-                version_status=host_version_status(host, cfg=update_cfg, latest_map=latest_map),
+                version_status=host_version_status(
+                    host,
+                    cfg=update_cfg,
+                    latest_map=latest_map,
+                    git_versions=git_release.versions,
+                ),
                 pending_agent_update=bool(host.pending_agent_update),
             )
         )
@@ -127,7 +142,8 @@ def list_hosts(
         total=total,
         page=page,
         page_size=page_size,
-        latest_agent_versions=latest_agent_versions_by_product(db),
+        latest_agent_versions=latest_map,
+        reference_agent_versions=reference_map,
     )
 
 
@@ -145,6 +161,7 @@ def _host_detail_from_model(
     last_hb = hb_map.get(host.id)
     latest_map = latest_agent_versions_by_product(db)
     update_cfg = get_effective_agent_update_config(db)
+    git_release = get_git_release_versions(update_cfg, db=db)
     return HostDetail(
         id=host.id,
         hostname=host.hostname,
@@ -161,7 +178,12 @@ def _host_detail_from_model(
         last_daily_report_at=report_map.get(host.id),
         last_inventory_at=host.inventory_updated_at,
         agent_status=compute_agent_status(last_hb, stale_minutes=settings.sac_heartbeat_stale_minutes),
-        version_status=host_version_status(host, cfg=update_cfg, latest_map=latest_map),
+        version_status=host_version_status(
+            host,
+            cfg=update_cfg,
+            latest_map=latest_map,
+            git_versions=git_release.versions,
+        ),
         pending_agent_update=bool(host.pending_agent_update),
         agent_instance_id=host.agent_instance_id,
         tags=host.tags if isinstance(host.tags, list) else [],