fix(buzz-acp): curated default kind list for SubscribeMode::All

[iroiro147]

Problem

In SubscribeMode::All, when the operator does not set a BUZZ_ACP_KINDS override, the ACP harness opens each channel subscription with a true wildcard (kinds: None) — see resolve_channel_filters() and resolve_dynamic_channel_filter().

A wildcard subscription means every sibling agent sharing a channel wakes on every event in it — including pure harness bookkeeping:

• kind 7 (reactions) — the harness's own 👀 (REACTION_SEEN) / 💬 (REACTION_WORKING) lifecycle markers, and
• kind 5 (NIP-09 deletions) from other agents.

Two or more agents in the same channel then mutually wake on each other's bookkeeping, storm indefinitely, burn tokens, and flood the channel with turns no user asked for. Reported in #4086 with a repro.

Fix (issue's option 3 — curated default with escape hatch)

When kinds_override is None, both resolvers now install the same curated default kind list instead of a wildcard:

[9, 40002, 40003, 1059, 40007, 40100, 46010, 46020]

Kind	Name	Why include
9	KIND_STREAM_MESSAGE	stream chat v1
40002	KIND_STREAM_MESSAGE_V2	stream chat v2
40003	KIND_STREAM_MESSAGE_EDIT	chat edits
1059	KIND_GIFT_WRAP	gift-wrapped DMs (NIP-17)
40007	KIND_STREAM_REMINDER	stream reminders
40100	KIND_CANVAS	channel canvas
46010	KIND_WORKFLOW_APPROVAL_REQUESTED	workflow approval requests
46020	KIND_WORKFLOW_TRIGGER	workflow triggers

Kinds 5 (NIP-09 deletion) and 7 (reaction) are deliberately excluded — they are harness bookkeeping, not user intent.

This exactly matches the reporter's verified workaround list from the issue discussion and is applied identically in both resolve_channel_filters() (bootstrap path) and resolve_dynamic_channel_filter() (instant-join path) so instantly-joined channels behave identically to bootstrapped ones.

Escape hatch preserved: setting BUZZ_ACP_KINDS explicitly (including 5 and 7) still takes effect unchanged; the override remains authoritative.

Tests

• test_all_mode_wildcard — updated: now asserts the curated Some(kinds) and asserts it excludes KIND_DELETION and KIND_REACTION.
• test_all_mode_dynamic_channel_matches_static — new lockstep test: dynamic join resolver must emit identical kinds/require_mention as the bootstrap resolver.
• test_all_mode_with_kinds_override — unchanged, still passes (override Some([9, 7]) flows through untouched).

Verification

cargo check  -p buzz-acp                            # OK
cargo test   -p buzz-acp --lib                      # 662 passed, 0 failed
cargo clippy -p buzz-acp --all-targets -- -D warnings  # OK

Fixes #4086.