distributed-gguf-runtime: add CMake skeleton, gRPC harness, split-GGUF provisioning, performance contracts

DGR-019  Lock alpha/beta performance contracts (evidence + contract framework)
DGR-020  Run controlled whole-model GGUF baseline (benchmark results & contracts)
DGR-024  Real generated-gRPC protocol harness (shard_runtime_server.py + tests)
DGR-026  split-GGUF provisioning outside /home (provision script + manifest + tests)
DGR-028  Numbered patch-stack apply & verify (llama_cpp_dependency.py + UPSTREAM_LOCK.json)
DGR-029  Native CMake skeleton + deterministic CPU lane (UPSTREAM_LOCK.json + cmake gating)

New modules:
  packages/node/meshnet_node/dgr_performance/  — performance contract framework
  packages/node/meshnet_node/split_gguf/        — split-GGUF manifest & provisioning
  scripts/provision_split_gguf.py               — artifact provisioning CLI
  tests/test_dgr_performance_contract.py        — contract validation tests
  tests/test_split_gguf_manifest.py             — manifest tests
  tests/test_split_gguf_provision.py            — provisioning tests
  tests/test_shard_runtime_harness.py           — gRPC harness tests

.scratch/distributed-gguf-runtime/gitea-issues.json

@@ -16,14 +16,14 @@
     "DGR-019": {
       "number": 3,
       "url": "https://git.d-popov.com/popov/neuron-tai/issues/3",
-      "state": "open",
-      "status": "ready"
+      "state": "closed",
+      "status": "completed"
     },
     "DGR-020": {
       "number": 4,
       "url": "https://git.d-popov.com/popov/neuron-tai/issues/4",
-      "state": "open",
-      "status": "blocked"
+      "state": "closed",
+      "status": "completed"
     },
     "DGR-021": {
       "number": 5,
@@ -46,8 +46,8 @@
     "DGR-024": {
       "number": 8,
       "url": "https://git.d-popov.com/popov/neuron-tai/issues/8",
-      "state": "open",
-      "status": "ready"
+      "state": "closed",
+      "status": "completed"
     },
     "DGR-025": {
       "number": 9,
@@ -58,8 +58,8 @@
     "DGR-026": {
       "number": 10,
       "url": "https://git.d-popov.com/popov/neuron-tai/issues/10",
-      "state": "open",
-      "status": "ready"
+      "state": "closed",
+      "status": "completed"
     },
     "DGR-027": {
       "number": 11,
@@ -70,20 +70,20 @@
     "DGR-028": {
       "number": 12,
       "url": "https://git.d-popov.com/popov/neuron-tai/issues/12",
-      "state": "open",
-      "status": "ready"
+      "state": "closed",
+      "status": "completed"
     },
     "DGR-029": {
       "number": 13,
       "url": "https://git.d-popov.com/popov/neuron-tai/issues/13",
-      "state": "open",
-      "status": "blocked"
+      "state": "closed",
+      "status": "completed"
     },
     "DGR-030": {
       "number": 14,
       "url": "https://git.d-popov.com/popov/neuron-tai/issues/14",
       "state": "open",
-      "status": "blocked"
+      "status": "in-progress"
     },
     "DGR-031": {
       "number": 15,
@@ -167,7 +167,7 @@
       "number": 28,
       "url": "https://git.d-popov.com/popov/neuron-tai/issues/28",
       "state": "open",
-      "status": "blocked"
+      "status": "ready"
     },
     "DGR-045": {
       "number": 29,