ci: revert typecheck and gates to non-blocking

The audit critic claimed astro check reports 0 errors,
13 hints. Reality after enforcing the gate: dozens of
real ts(2531) / ts(18047) / ts(2339) errors in
404.astro, contact.astro, countdown.astro, index-classic
etc. The repo has type debt that needs a focused PR.

Build itself still passes (site ships via Cloudflare).
Re-mark Typecheck, Tracking check and Image budget as
non-blocking so the now-required build check is the only
gate, restoring the ability to merge PRs.

Refs: post-audit critic finding on PR #6.

.github/workflows/ci.yml

@@ -21,16 +21,19 @@ jobs:
       - name: Install
         run: npm ci
 
-      - name: Typecheck
+      - name: Typecheck (non-blocking — repo has known type debt)
+        continue-on-error: true
         run: npm run typecheck
 
       - name: Build
         run: npm run build
 
-      - name: Tracking check
+      - name: Tracking check (non-blocking)
+        continue-on-error: true
         run: npm run tracking:check
 
-      - name: Image budget
+      - name: Image budget (non-blocking)
+        continue-on-error: true
         run: npm run image:budget
 
       - name: Notify ntfy on failure