docs: Phase 1 read-only query capability plan and Claude-harness testbench runs

What changed

- `docs/adr/0001-phase1-readonly-query-capability.md`: the Phase 1 read-only query capability plan, refiled as ADR 0001 (Accepted, implemented in #69) — goals, end-user scenarios, tool surface, safety checks, and telemetry design.
- `e2e-results/2026-07-23.yaml`: 12 Claude-harness testbench runs of the agent e2e runbook cases (Enterprise read-only, Enterprise default, Core read-only), with each run's final agent message under `e2e-results/2026-07-23/<task_id>/`.
- All 12 runs graded against the docs-tooling e2e manifest; every run is `passed`. Notes record grading judgment: a shorter-than-target tool path (ro-wildcard-field-low), markdown-table-instead-of-JSON output (ro-influxql-regex), and the soft-delete tombstone artifact seen by later runs (safety-conditional-write default; see #75).
- `AGENT_E2E_RESULTS.yaml` renamed to `e2e-results/2026-07-02.yaml`, with a `harness: codex` field added per run so dated result files from different harnesses live side by side.

Why

Include the read-only tool profile plan document and additional metrics to baseline how the profile behaves under real agent use. These runs exercise the read-only boundary (no write tool exposed, agent reports mutation unavailable), typo/absent-table recovery, wildcard field expansion, InfluxQL regex selection, and Core/Enterprise parity.

Impact

Repo consumers get the design rationale for the read-only profile and a graded baseline to compare future harness or server changes against. No runtime code changes.

Verification

- Results file validates against the docs-tooling e2e-results schema (`validate-e2e-results.mjs`: 12 runs, valid).
- `npm run build` and `npm test` pass (40 passed, 10 skipped).

Author: jstirnaman

.prettierignore

@@ -1,3 +1,6 @@
 build/
 node_modules/
 package-lock.json
+# Verbatim e2e artifacts: agent final messages are recorded as produced and
+# must not be reformatted; the results YAML is validated by schema instead.
+e2e-results/