chore(spec-005): mark page-fetcher in progress, link issue #9

Refs #9

Author: hendrikebbers

docs/specs/INDEX.md

@@ -10,7 +10,7 @@ roadmap step, to be implemented sequentially (each builds on the previous).
 | 002 | 002-content-source-config | Content source config | backend, architecture, configuration | `ContentSource` abstraction + `@ConfigurationProperties` + Ant-glob URL matching | #3 | done |
 | 003 | 003-content-document-index | Content document & index | backend, search, data-model | `ContentDocument` record + Meilisearch `IndexSettings` bean | #5 | done |
 | 004 | 004-sitemap-crawler | Sitemap crawler | backend, crawler | `SitemapCrawler` — sitemap discovery of URLs + lastmod | #7 | done |
-| 005 | 005-page-fetcher | Page fetcher | backend, crawler | `PageFetcher` — robust HTTP fetch (ETag/IMS, rate limit, retry) | — | open |
+| 005 | 005-page-fetcher | Page fetcher | backend, crawler | `PageFetcher` — robust HTTP fetch (ETag/IMS, rate limit, retry) | #9 | in progress |
 | 006 | 006-content-extractor | Content extractor | backend, crawler | `ContentExtractor` — jsoup content + metadata extraction | — | open |
 | 007 | 007-source-strategy | Source strategy | backend, architecture | `ContentSourceStrategy` interface + `WebsiteSourceStrategy` | — | open |
 | 008 | 008-content-indexer | Content indexer | backend, search, crawler | `ContentIndexer` — orchestration, diff, upsert/delete | — | open |