fix: migrate Runware catalog to modelSearch; failure cooldown (v0.18.3 R4)

Runware retired taskType:models; all 42 daily catalog 401s come from this

deprecated endpoint. Migrated to auth+modelSearch pair per Runware's

current API. Paginator fetches up to 5 pages x 100 = 500 models, filters

client-side to io:text-to-image in capabilities[]. Uses air identifier as

model id. Cache key bumped to v2 (prautoblogger_runware_model_cache_v2)

to invalidate v1 rows that used old taskType/requiresImage shape.

Failure cooldown: sync() records prautoblogger_runware_catalog_last_failure_at

on every error path. get_models() gates re-trigger via is_in_failure_cooldown()

which reads prautoblogger_runware_catalog_failure_cooldown_seconds (default

3600s). Success clears the timestamp. Caps cascade to ~24 errors/day.

300-line rule: fetching/normalization extracted to new companion class

PRAutoBlogger_Runware_Catalog_Fetcher (class-runware-catalog-fetcher.php,

205 lines). Catalog class: 261 lines. Autoloader picks up the new file.

Tests: normalize_models against real modelSearch fixture (redacted key);

cooldown behavior (failure->active->expired); sync clears timestamp; fallback

list always served when cache empty. 328/328 PHPUnit green.

Agent-Session: prab-v0183-20260612

tests/fixtures/runware-model-search-page1.json

@@ -0,0 +1,131 @@
+{
+  "data": [
+    {
+      "taskType": "modelSearch",
+      "taskUUID": "aabbccdd-0000-0000-0000-000000000001",
+      "totalResults": 5,
+      "results": [
+        {
+          "air": "runware:100@1",
+          "name": "FLUX.1 schnell",
+          "nameContent": "FLUX.1 schnell",
+          "comment": "Fast 4-step text-to-image model",
+          "category": "checkpoint",
+          "private": false,
+          "capabilities": ["io:text-to-image", "form:checkpoint"],
+          "tags": [],
+          "heroImage": "",
+          "version": "",
+          "architecture": "",
+          "nsfwLevel": null,
+          "downloadCount": 0,
+          "inferenceCount24h": 0,
+          "rating": 0,
+          "ratingCount": 0,
+          "thumbsUpCount": 0,
+          "thumbsDownCount": 0,
+          "featured": 1,
+          "addedUnixTimestamp": 0,
+          "updatedDateUnixTimestamp": 0,
+          "source": "curated"
+        },
+        {
+          "air": "runware:101@1",
+          "name": "FLUX.1 dev",
+          "nameContent": "FLUX.1 dev",
+          "comment": "High fidelity 28-step text-to-image model",
+          "category": "checkpoint",
+          "private": false,
+          "capabilities": ["io:text-to-image", "form:checkpoint"],
+          "tags": [],
+          "heroImage": "",
+          "version": "",
+          "architecture": "",
+          "nsfwLevel": null,
+          "downloadCount": 0,
+          "inferenceCount24h": 0,
+          "rating": 0,
+          "ratingCount": 0,
+          "thumbsUpCount": 0,
+          "thumbsDownCount": 0,
+          "featured": 0,
+          "addedUnixTimestamp": 0,
+          "updatedDateUnixTimestamp": 0,
+          "source": "curated"
+        },
+        {
+          "air": "some-text-model:llm@1",
+          "name": "Some Text LLM",
+          "nameContent": "Some Text LLM",
+          "comment": "A text-to-text model that should be excluded",
+          "category": "text",
+          "private": false,
+          "capabilities": ["io:text-to-text", "form:checkpoint"],
+          "tags": [],
+          "heroImage": "",
+          "version": "",
+          "architecture": "",
+          "nsfwLevel": null,
+          "downloadCount": 0,
+          "inferenceCount24h": 0,
+          "rating": 0,
+          "ratingCount": 0,
+          "thumbsUpCount": 0,
+          "thumbsDownCount": 0,
+          "featured": 0,
+          "addedUnixTimestamp": 0,
+          "updatedDateUnixTimestamp": 0,
+          "source": "curated"
+        },
+        {
+          "air": "runware:400@2",
+          "name": "FLUX.2 klein 9B",
+          "nameContent": "FLUX.2 klein 9B",
+          "comment": "Compact 9B text-to-image model",
+          "category": "checkpoint",
+          "private": false,
+          "capabilities": ["io:text-to-image", "form:checkpoint"],
+          "tags": [],
+          "heroImage": "",
+          "version": "",
+          "architecture": "",
+          "nsfwLevel": null,
+          "downloadCount": 0,
+          "inferenceCount24h": 0,
+          "rating": 0,
+          "ratingCount": 0,
+          "thumbsUpCount": 0,
+          "thumbsDownCount": 0,
+          "featured": 0,
+          "addedUnixTimestamp": 0,
+          "updatedDateUnixTimestamp": 0,
+          "source": "curated"
+        },
+        {
+          "air": "upscale-model:upscaler@1",
+          "name": "Upscale Model",
+          "nameContent": "Upscale Model",
+          "comment": "Image upscaler — should be excluded from t2i list",
+          "category": "checkpoint",
+          "private": false,
+          "capabilities": ["io:image-to-image", "op:upscale", "form:checkpoint"],
+          "tags": [],
+          "heroImage": "",
+          "version": "",
+          "architecture": "",
+          "nsfwLevel": null,
+          "downloadCount": 0,
+          "inferenceCount24h": 0,
+          "rating": 0,
+          "ratingCount": 0,
+          "thumbsUpCount": 0,
+          "thumbsDownCount": 0,
+          "featured": 0,
+          "addedUnixTimestamp": 0,
+          "updatedDateUnixTimestamp": 0,
+          "source": "curated"
+        }
+      ]
+    }
+  ]
+}