chore(release): drop the superseded v0.20 screenshot script (#1262)

#1261 replaced this one-off capture with a manifest-driven script, so the
v0.20 version is dead weight: hard-coded slugs, paths and output directory,
none of the fail-closed guards, and two `RegExp`-from-string constructions of
the kind CodeQL flags (one of which it flagged on the replacement before that
was rewritten to use predicates).

Removing it also drops its `tools/eslint/max-lines-baseline.mjs` entry, so the
baseline no longer carries a file that does not exist.

Not a pure dead-code deletion, and worth stating: two capabilities go with it,
neither reachable from the new pipeline — `createDesignedCopy` (title/kicker
overlays on captured frames) and `createHeroImage` (a 1600x900 canvas collage
built from three screenshots). The v0.20 assets they produced are already
committed under apps/website/public/blog/v0-20/, so nothing published breaks;
a future release wanting the same collage needs it ported deliberately rather
than resurrected here.

Docs: docs/architecture/xtream-mock-server.md now points at
capture-release-screenshots.ts and notes its mock-identity check.

Verified: no references to the removed file remain anywhere in the repo, and
`pnpm run lint` passes for all 42 projects with the shortened baseline.

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

docs/architecture/xtream-mock-server.md

@@ -284,8 +284,9 @@ This scenario is reserved for release screenshots and marketing materials:
   including documentary, noir, animated family, retro rescue drama, cyberpunk,
   anime-inspired space school, and workplace dramedy styles
 - screenshot capture remains deterministic and offline because
-  `tools/release/capture-v020-screenshots.ts` consumes the local mock server
-  assets and never calls OpenAI
+  `tools/release/capture-release-screenshots.ts` consumes the local mock server
+  assets and never calls OpenAI; its guards additionally verify that the
+  service answering on the mock port really is this fixture server
 - the SVG renderer in `marketing.generator.ts` remains the fallback for missing
   assets, live logos, season covers, and episode thumbnails
 

tools/eslint/max-lines-baseline.mjs

@@ -130,6 +130,5 @@ export const maxLinesBaseline = [
     'libs/workspace/shell/feature/src/lib/workspace-shell/services/helpers/workspace-shell-command-builders.ts',
     'libs/workspace/shell/feature/src/lib/workspace-shell/services/workspace-shell.facade.spec.ts',
     'libs/workspace/shell/feature/src/lib/workspace-shell/workspace-shell.component.spec.ts',
-    'tools/release/capture-v020-screenshots.ts',
     'tools/release/generate-marketing-artwork.ts',
 ];