feat: implement internet path functionality with backend support

Added internet path settings and snapshot management to the application. This includes new database tables for internet path settings and snapshots, API routes for fetching and managing internet path data, and integration into the dashboard and data collection pages. Enhanced the scheduler to support internet path jobs, ensuring regular data collection and updates. Updated relevant types and interfaces to accommodate the new functionality.

backend/src/db/schema.ts

@@ -464,6 +464,24 @@ export const uptimeSpeedTestRuns = sqliteTable("uptime_speed_test_runs", {
   createdAt:          text("created_at").notNull().default(sql`(datetime('now'))`),
 })
 
+export const internetPathSettings = sqliteTable("internet_path_settings", {
+  id:             integer("id").primaryKey(),
+  enabled:        integer("enabled", { mode: "boolean" }).notNull().default(true),
+  intervalSec:    integer("interval_sec").notNull().default(300),
+  retentionDays:  integer("retention_days").notNull().default(14),
+  lastCollectedAt: text("last_collected_at"),
+  lastDurationMs: integer("last_duration_ms"),
+  lastError:      text("last_error"),
+  createdAt:      text("created_at").notNull().default(sql`(datetime('now'))`),
+  updatedAt:      text("updated_at").notNull().default(sql`(datetime('now'))`),
+})
+
+export const internetPathSnapshots = sqliteTable("internet_path_snapshots", {
+  id:          integer("id").primaryKey({ autoIncrement: true }),
+  sampledAt:   text("sampled_at").notNull(),
+  payloadJson: text("payload_json").notNull(),
+})
+
 // ── inferred types ─────────────────────────────────────────────────────────────
 
 export type Server         = typeof servers.$inferSelect
@@ -481,6 +499,8 @@ export type UptimeProbeSampleRow = typeof uptimeProbeSamples.$inferSelect
 export type UptimeResourceSampleRow = typeof uptimeResourceSamples.$inferSelect
 export type UptimeSpeedProbeRow = typeof uptimeSpeedProbes.$inferSelect
 export type UptimeSpeedTestRunRow = typeof uptimeSpeedTestRuns.$inferSelect
+export type InternetPathSettingsRow = typeof internetPathSettings.$inferSelect
+export type InternetPathSnapshotRow = typeof internetPathSnapshots.$inferSelect
 export type SchedulerRunRow = typeof schedulerRuns.$inferSelect
 export type EventRow = typeof events.$inferSelect
 export type EvobgpSettingsRow = typeof evobgpSettings.$inferSelect