release notes: follow-ups from #295 (Communique token limit) #296

#295 raised Communique's response limit to max_tokens = 16384, so release notes are no longer cut off for releases with more than about 15 commits. Its review left these follow-ups:

1. Log the model response's stop_reason. Today a cut-off answer is only inferred from the "malformed 3 times ... salvaging" warning.
2. When the communique pin in mise.toml changes, update the "1.1.3 uses 4096" wording in MALFORMED_SUBMISSION_HINT (src/tools/release-please-runner.ts), the communique.toml comment, docs/RELEASE-PROCESS.md and src/tools/README.md.
3. Decide whether to bump communique to 1.2.2 for its changed salvage behavior.
4. On the next large release-please runs, watch run time against the 20-minute job timeout (release-please.yml) and the "salvaging" warning.

Trigger: the next communique pin bump, or a Release Please run that warns or fails again.

Generated with xum • Model: anthropic:claude-opus-5-5 • Thinking: high