feat(arcrun): mira wiki page with tag filter + accumulated WIP

- landing/app/mira/wiki: tag=mira-wiki list now shows all wiki paragraphs
  (depends on KBDB tag filter exposed in matrix/kbdb commit, separate repo)
- landing: app/mira hub + feed split + various WIP from prior sessions
- registry/components: claude_api / kbdb_create_block / kbdb_get / km_writer /
  platform_crypto / auth_oauth2 contracts + main.go (accumulated)
- .component-builds: pkg-lock updates + index.ts adjustments (WIP)
- .agents/specs/arcrun/frontend-redesign: design notes
- docs/test_credentials, docs/user_requirements/arcrun-landing-page: WIP docs
- cypher-executor: auth-dispatcher / wasi-shim adjustments (WIP)

Includes accumulated work from prior sessions plus the wiki UI tag-filter
update that surfaces the AI-generated wiki paragraphs at /mira/wiki.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.component-builds/kbdb_ingest/wrangler.toml

@@ -0,0 +1,11 @@
+name = "arcrun-kbdb-ingest"
+main = "src/index.ts"
+compatibility_date = "2025-02-19"
+compatibility_flags = ["nodejs_compat"]
+
+[vars]
+COMPONENT_ID = "kbdb_ingest"
+
+[[routes]]
+pattern = "kbdb-ingest.arcrun.dev/*"
+zone_name = "arcrun.dev"