feat: vendor midstream and sublinear-time-solver libraries (#109)

Add ruvnet/midstream (AIMDS real-time inference) and
ruvnet/sublinear-time-solver (sublinear optimization algorithms)
as vendored dependencies under vendor/.

vendor/sublinear-time-solver/.claude/commands/optimization/parallel-execute.md

@@ -0,0 +1,25 @@
+# parallel-execute
+
+Execute tasks in parallel for maximum efficiency.
+
+## Usage
+```bash
+npx claude-flow optimization parallel-execute [options]
+```
+
+## Options
+- `--tasks <file>` - Task list file
+- `--max-parallel <n>` - Maximum parallel tasks
+- `--strategy <type>` - Execution strategy
+
+## Examples
+```bash
+# Execute task list
+npx claude-flow optimization parallel-execute --tasks tasks.json
+
+# Limit parallelism
+npx claude-flow optimization parallel-execute --tasks tasks.json --max-parallel 5
+
+# Custom strategy
+npx claude-flow optimization parallel-execute --strategy adaptive
+```