chore(deps): bump pydantic 2.12.5, flash-attn 2.8.3; refine renovate grouping

Manually apply the two remaining safe minor bumps that had merge conflicts.

Renovate config now separates torch, nvidia pytorch, and transformers
into their own PRs (need GPU/loader testing) while auto-merging
everything else in loaders.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: GangGreenTemperTatum

.github/renovate.json5

@@ -40,8 +40,31 @@
       matchPackageNames: ["python"],
       enabled: false,
     },
+    // ML framework packages get their own PRs — big jumps need manual review
     {
-      description: "Group loader dependency updates (non-major)",
+      description: "Separate torch updates (needs GPU testing)",
+      matchFileNames: ["dyana/loaders/**"],
+      matchPackageNames: ["torch"],
+      groupName: "torch",
+      groupSlug: "torch",
+    },
+    {
+      description: "Separate nvidia container updates (needs GPU testing)",
+      matchFileNames: ["dyana/loaders/**"],
+      matchPackageNames: ["nvcr.io/nvidia/pytorch"],
+      groupName: "nvidia pytorch",
+      groupSlug: "nvidia-pytorch",
+    },
+    {
+      description: "Separate transformers updates (may break loaders)",
+      matchFileNames: ["dyana/loaders/**"],
+      matchPackageNames: ["transformers"],
+      groupName: "transformers",
+      groupSlug: "transformers",
+    },
+    // Everything else in loaders grouped together and auto-merged
+    {
+      description: "Group remaining loader dependencies (non-major)",
       matchFileNames: ["dyana/loaders/**"],
       matchUpdateTypes: ["minor", "patch"],
       groupName: "loader dependencies non-major",
@@ -50,7 +73,7 @@
       automergeType: "pr",
     },
     {
-      description: "Group loader dependency updates (major)",
+      description: "Group remaining loader dependencies (major)",
       matchFileNames: ["dyana/loaders/**"],
       matchUpdateTypes: ["major"],
       groupName: "loader dependencies major",

dyana/loaders/base/dyana-requirements-gpu.txt

@@ -1,3 +1,3 @@
 psutil==6.1.1
 torch==2.5.1
-pydantic==2.9.2
+pydantic==2.12.5

dyana/loaders/base/dyana-requirements.txt

@@ -1,2 +1,2 @@
 psutil==6.1.1
-pydantic==2.9.2
+pydantic==2.12.5

dyana/loaders/megatron/requirements.txt

@@ -7,7 +7,7 @@ packaging>=20.0
 typing_extensions>=4.0.0
 
 # Megatron DMC dependencies
-flash-attn==2.6.1
+flash-attn==2.8.3
 sentencepiece==0.2.1
 hydra-core==1.3.2
 hydra_colorlog==1.2.0