CLI improvements: --json output, filters, arch-search, ecal-score, deck fixes

6 CLI improvements from MCP integration testing + deck bug fixes:

- kb_cli.py: --json on search, new arch-search and ecal-score subcommands,
  _load_yaml handles multi-document YAML (fixes health command on 32 files)
- findings_cli.py: --json on search/list/stats, filter flags on search
  (--product, --severity, --tag, --client, --status, --category)
- validate-architecture.py: --profile optional, --output defaults to stdout
- common-objections.yaml + ecal-artefacts-catalog.yaml: merge front matter
- oci_deck_gen.py: fix slide 9 cost_notes char iteration, fix slide 12
  migration field mapping (duration/milestones), dynamic phase spacing
- proposal-spec.yaml: replace real name with fictional Carlos Mendoza

All 14 skill options validated with generated deliverables.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

examples/output-cli-improvements-deliverables/opt06-feature-auto-indexing.json

@@ -0,0 +1,50 @@
+[
+  {
+    "feature": "Auto Indexing",
+    "category": "auto_management",
+    "compatibility": [
+      {
+        "deployment": "ADB-S Serverless",
+        "version": "23ai",
+        "status": "GA_CAVEAT",
+        "notes": "Creates indexes HIDDEN by default. Instantly reversible. DML costing prevents over-indexing. Deduplication with manually created indexes."
+      },
+      {
+        "deployment": "ADB-S Serverless",
+        "version": "26ai",
+        "status": "GA",
+        "notes": "Improved in 26ai \u2014 better cost model, fewer false positives."
+      },
+      {
+        "deployment": "ADB-S Elastic Pool",
+        "version": "23ai",
+        "status": "GA_CAVEAT",
+        "notes": "Same as ADB-S Serverless."
+      },
+      {
+        "deployment": "ADB Dedicated Elastic Pool (DEP)",
+        "version": "23ai",
+        "status": "GA_CAVEAT",
+        "notes": "Available but less tested in DEP."
+      },
+      {
+        "deployment": "ADB on Dedicated Exadata",
+        "version": "23ai",
+        "status": "GA",
+        "notes": "Fully supported."
+      },
+      {
+        "deployment": "Exadata Cloud Service",
+        "version": "23ai",
+        "status": "NOT_AVAIL",
+        "notes": "Not an ADB feature. Use manual indexing."
+      },
+      {
+        "deployment": "Base DB Service (EE)",
+        "version": "23ai",
+        "status": "NOT_AVAIL",
+        "notes": ""
+      }
+    ]
+  }
+]