perf(docker): replace subprocess spawning with Docker Engine HTTP API

.changeset/docker-perf-dockerode.md

@@ -0,0 +1,7 @@
+---
+"@cruncher/adapter-docker": major
+---
+
+Replace subprocess spawning with Docker Engine HTTP API via dockerode. This eliminates per-query process fork/exec overhead, fixes line buffering bugs that could silently drop log lines spanning chunk boundaries, pre-compiles log pattern regexes, and delivers incremental results as each container completes instead of waiting for all.
+
+BREAKING: The `binaryLocation` param has been removed since the adapter now communicates directly with the Docker socket instead of shelling out to the `docker` CLI binary.

docs/src/content/docs/adapters/docker.mdx

@@ -14,14 +14,8 @@ import { Badge } from '@astrojs/starlight/components';
 
 ## Params
 
-<ParamItem label="binaryLocation" type="string" default="docker">
-    Path to the Docker binary. Override this if `docker` is not on your `PATH` or you want to use a specific version.
-    ```yaml
-    binaryLocation: /usr/local/bin/docker
-    ```
-</ParamItem>
-<ParamItem label="dockerHost" type="string">
-    The docker host url to use for docker commands.
+<ParamItem label="dockerHost" type="string" default="unix:///var/run/docker.sock">
+    The Docker Engine API endpoint. Supports Unix sockets (`unix:///var/run/docker.sock`) and TCP hosts (`tcp://localhost:2375`).
 </ParamItem>
 <ParamItem label="containerFilter" type="string">
     A filter to apply to the containers when listing them. This can be used to limit the containers that Cruncher will interact with.

packages/adapters/docker/package.json

@@ -43,10 +43,12 @@
     "@cruncher/adapter-utils": "workspace:*",
     "@cruncher/qql": "workspace:*",
     "ansicolor": "^2.0.3",
+    "dockerode": "^4.0.4",
     "merge-k-sorted-arrays": "^2.1.0",
     "zod": "^4.3.6"
   },
   "devDependencies": {
+    "@types/dockerode": "^3.3.38",
     "@types/node": "^25.3.5",
     "typescript": "^5.9.3"
   }