get_series_updates

Previous value: -"Metadata describing a FRED series (the `fred/series` endpoint).\n\nALFRED vintage fields (`realtime_start` / `realtime_end`) are deferred for v1\nand ignored on the wire (ADR-0005). `last_updated` is kept as FRED's raw\nstring for now — FRED encodes it with a non-standard timezone offset (e.g.\n`2024-03-28 07:56:03-05`); a typed datetime is a later refinement."New value: +"Metadata describing a FRED series (the `fred/series` endpoint).\n\nThis `series` metadata endpoint's own ALFRED fields (`realtime_start` /\n`realtime_end`) are still ignored on the wire (ADR-0005); point-in-time\n*observations* are supported via [`Observation`](crate::Observation) and\n[`ObservationsRequest::realtime`](crate::ObservationsRequest::realtime)\n(ADR-0024). `last_updated` is kept as FRED's raw string for now — FRED\nencodes it with a non-standard timezone offset (e.g. `2024-03-28 07:56:03-05`);\na typed datetime is a later refinement."

Previous value: -nullNew value: +{
+  "$defs": {
+    "Frequency": {
+      "type": "string"
+    },
+    "SeasonalAdjustment": {
+      "type": "string"
+    },
+    "Series": {
+      "description": "Metadata describing a FRED series (the `fred/series` endpoint).\n\nALFRED vintage fields (`realtime_start` / `realtime_end`) are deferred for v1\nand ignored on the wire (ADR-0005). `last_updated` is kept as FRED's raw\nstring for now — FRED encodes it with a non-standard timezone offset (e.g.\n`2024-03-28 07:56:03-05`); a typed datetime is a later refinement.",
+      "properties": {
+        "frequency": {
+          "$ref": "#/$defs/Frequency",
+          "description": "The series' native reporting frequency."
+        },
+        "id": {
+          "$ref": "#/$defs/SeriesId",
+          "description": "The series identifier."
+        },
+        "last_updated": {
+          "description": "When FRED last updated the series, as FRED's raw timestamp string.",
+          "type": "string"
+        },
+        "notes": {
+          "default": null,
+          "description": "Editorial notes, when present.",
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "observation_end": {
+          "description": "Date of the latest available observation.",
+          "format": "date",
+          "type": "string"
+        },
+        "observation_start": {
+          "description": "Date of the earliest available observation.",
+          "format": "date",
+          "type": "string"
+        },
+        "popularity": {
+          "description": "FRED popularity score (0–100).",
+          "format": "uint32",
+          "minimum": 0,
+          "type": "integer"
+        },
+        "seasonal_adjustment": {
+          "$ref": "#/$defs/SeasonalAdjustment",
+          "description": "Whether/how the series is seasonally adjusted."
+        },
+        "title": {
+          "description": "Human-readable title, e.g. `\"Real Gross National Product\"`.",
+          "type": "string"
+        },
+        "units": {
+          "description": "Free-form units description, e.g. `\"Billions of Chained 2017 Dollars\"`.\nThis is descriptive text, *not* the closed-vocabulary units transform\nused in observation requests (modelled separately, later).",
+          "type": "string"
+        }
+      },
+      "required": [
+        "id",
+        "title",
+        "observation_start",
+        "observation_end",
+        "frequency",
+        "seasonal_adjustment",
+        "units",
+        "popularity",
+        "notes",
+        "last_updated"
+      ],
+      "type": "object"
+    },
+    "SeriesId": {
+      "description": "A FRED series identifier, e.g. `GNPCA` or `UNRATE`.\n\nA newtype over `String` so a series id can't be silently swapped for another\nkind of identifier or an arbitrary string (see ADR-0005). Construction does\nno validation for now — FRED rejects malformed ids — but the newtype gives\nus a place to add it later without changing call sites.",
+      "type": "string"
+    }
+  },
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "properties": {
+    "count": {
+      "description": "Total number of matches across all pages.",
+      "format": "uint32",
+      "minimum": 0,
+      "type": "integer"
+    },
+    "limit": {
+      "description": "Page-size limit that FRED applied.",
+      "format": "uint32",
+      "minimum": 0,
+      "type": "integer"
+    },
+    "offset": {
+      "description": "Offset of this page into the full result set.",
+      "format": "uint32",
+      "minimum": 0,
+      "type": "integer"
+    },
+    "series": {
+      "description": "The matching series on this page. FRED names the array `seriess` (sic) on\nthe wire; we read that but emit the correctly-spelled `series` on output.",
+      "items": {
+        "$ref": "#/$defs/Series"
+      },
+      "type": "array"
+    }
+  },
+  "required": [
+    "series",
+    "count",
+    "offset",
+    "limit"
+  ],
+  "type": "object"
+}