Add LLDP collect page with conservative fabric edge lifecycle.

Move scheduled discovery under Network → LLDP links, mark absent edges missing after one successful scan, purge only after four miss cycles, and expose unmatched/raw job detail.

Co-authored-by: Cursor <cursoragent@cursor.com>

netx_api/lldp_collect_schemas.py

@@ -0,0 +1,65 @@
+"""Schemas for network-management LLDP link collect (policy + dashboard)."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from typing import Any
+
+from pydantic import BaseModel, Field
+
+
+class LldpCollectTargetRef(BaseModel):
+    source: str = "managed"  # managed | ume
+    id: str
+
+
+class LldpCollectPolicyOut(BaseModel):
+    enabled: bool = False
+    interval_days: int = 1
+    concurrency: int = 4
+    scope_mode: str = "all"
+    selected_targets: list[LldpCollectTargetRef] = Field(default_factory=list)
+    auto_add_unmatched: bool = True
+    updated_at: datetime | None = None
+
+
+class LldpCollectPolicyUpdate(BaseModel):
+    enabled: bool | None = None
+    interval_days: int | None = Field(default=None, ge=1, le=365)
+    concurrency: int | None = Field(default=None, ge=1, le=32)
+    scope_mode: str | None = None
+    selected_targets: list[LldpCollectTargetRef] | None = None
+    auto_add_unmatched: bool | None = None
+
+
+class LldpCollectJobSummary(BaseModel):
+    id: str
+    scope: str = ""
+    trigger_mode: str = "manual"
+    status: str = ""
+    total: int = 0
+    done: int = 0
+    edges_added: int = 0
+    edges_updated: int = 0
+    edges_stale: int = 0
+    error: str = ""
+    started_at: datetime | None = None
+    ended_at: datetime | None = None
+    created_at: datetime | None = None
+
+
+class LldpCollectDashboardOut(BaseModel):
+    policy: LldpCollectPolicyOut
+    fabric_node_count: int = 0
+    fabric_edge_count: int = 0
+    fabric_edge_active: int = 0
+    fabric_edge_stale: int = 0
+    last_discover_at: datetime | None = None
+    running_job: LldpCollectJobSummary | None = None
+    last_job: LldpCollectJobSummary | None = None
+    next_due_at: datetime | None = None
+
+
+class LldpCollectStartOut(BaseModel):
+    ok: bool = True
+    job: dict[str, Any] = Field(default_factory=dict)