Package portable Linux runtime and verify Google CPU search

docs/evidence/linux-headless-archive.json

@@ -0,0 +1,39 @@
+{
+  "platform": "linux-x86_64",
+  "cpu_only": true,
+  "archive_sha256": "1e5a07edd4d94b49d2550914163637eca84087c802df0bb59b68168b849544e5",
+  "archive_bytes": 148157038,
+  "verified_files": 29,
+  "extraction_path_contains_spaces": true,
+  "automatic_media_helper_discovery": "passed",
+  "embedding_report": {
+    "media_files": 1,
+    "media_failures": 0,
+    "failures": [],
+    "passages": 2,
+    "chunks": 3,
+    "generation": 1,
+    "model_fingerprint": "google/embeddinggemma-2:bfcd298762cc34d0357ece5ebdd31791a3a374d8:q8_0:llama-b11461-no-logits-v1:mean:l2:query512:doc2048:windows-overlap128:prompts-v1:byte64k-overlap512-title512-v1:google/embeddinggemma-2:bfcd298762cc34d0357ece5ebdd31791a3a374d8:q8_0:llama-b11461-no-logits-v1:mtmd:mean:l2:rgb-catmullrom48-exif-largejpeg-scaled-v2:pcm16k30s-v1:image280-frame70-audio30s-overlap2-distributed240-scene120-v1"
+  },
+  "semantic_top_filename": "supplier.md",
+  "code_source": {
+    "kind": "line",
+    "number": 1
+  },
+  "strict_filter": "passed",
+  "command_elapsed_ms": {
+    "help": 1444.2557980000856,
+    "index": 897.0072200000914,
+    "embed": 12126.549685999977,
+    "semantic_search": 964.4444650000423,
+    "code_search": 1260.825207000039,
+    "strict_filter": 966.029466000009
+  },
+  "timing_scope": "single deployment smoke samples; not retrieval/performance benchmarks",
+  "limitations": [
+    "GPU untested",
+    "desktop untested",
+    "clean-machine/ABI coverage untested",
+    "broad retrieval quality untested"
+  ]
+}