fix(opencode): correct remaining agent/skill doc drift

- pr-review: replace invalid 'tea pr comment' with 'tea comment' (the
  former is not a tea subcommand)
- integrator: drop stray '-M' from client examples (-M is now
  --remote-option and requires an argument), use the canonical pytest
  integration command, and bump the CI image tag to v10
- test-writer: build fuzz targets via -DENABLE_FUZZ=ON instead of
  hand-rolled -fsanitize flags; fix the fuzz binary path
- cmake-expert: document -DSANITIZER=undefined, which is now live in
  CMakeLists.txt
- README: add --allow-unauthenticated to the plain-TCP server example,
  use --preserve for metadata (not -M), and use the canonical
  integration command
- AGENTS.md: use the canonical integration command

README.md

@@ -314,7 +314,7 @@ ssh user@host 'mkdir -p destination'
 Start the FastSync server:
 
 ```bash
-./build/server --destination-root /path/to -p 8080
+./build/server --destination-root /path/to -p 8080 --allow-unauthenticated
 ```
 
 Then run the client:
@@ -366,7 +366,7 @@ FastSync-native are optional performance or transport extensions.
 ./build/client --incremental --checksum /source/ user@host:destination/
 
 #Preserve supported mode and timestamp metadata
-./build/client -M /source/ user@host:destination/
+./build/client --preserve /source/ user@host:destination/
 
 #Keep backups of overwritten destination files
 ./build/client --backup --backup-dir backups \
@@ -643,7 +643,7 @@ Run the unit test binary:
 Run the Python integration suite:
 
 ```bash
-python3 -m pytest tests/
+python3 -m pytest tests/integration/ -n 4 --dist=load -m "not setpriv"
 ```
 
 For stricter local validation: