chore: remove vestigial zip/REST deploy artifacts (0.20.2)

Remove scripts/deploy.sh and .distignore which belonged to the retired
Code-Snippets REST deploy receiver (prautoblogger-deploy/v1/*). The live
pipeline is the shared rsync workflow in peptide-e2e; it uses hardcoded
--exclude flags and never reads .distignore.

Safety checks:
- No workflow in .github/workflows/ references scripts/deploy.sh
- peptide-e2e deploy-app.yml confirmed to NOT consume .distignore

Version bump: 0.20.1 -> 0.20.2 (patch; no functional change)

Agent-Session: cowork-deploy-skill-cleanup

prautoblogger.php

@@ -9,7 +9,7 @@
  * Plugin Name:       PRAutoBlogger
  * Plugin URI:        https://peptiderepo.com/prautoblogger
  * Description:       Monitors social media for trending topics, generates SEO-friendly blog posts using AI, and publishes them on a daily schedule with full cost tracking and self-improvement metrics.
- * Version:           0.20.1
+ * Version:           0.20.2
  * Requires at least: 6.0
  * Requires PHP:      7.4
  * Author:            PeptideRepo
@@ -35,7 +35,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 | Defined here so every file in the plugin can reference paths, versions,
 | and limits without magic strings.
 */
-define( 'PRAUTOBLOGGER_VERSION', '0.20.1' );
+define( 'PRAUTOBLOGGER_VERSION', '0.20.2' );
 define( 'PRAUTOBLOGGER_DB_VERSION', '1.3.0' );
 define( 'PRAUTOBLOGGER_DEFAULT_RUN_CEILING_USD', 0.50 );
 define( 'PRAUTOBLOGGER_DEFAULT_REQUEST_JSON_RETENTION_DAYS', 14 );