feat(adapters): full write-side capability set across 30 high-impact integrations

[drewstone]

Adds writable + missing-read capabilities across 30 integration adapters, plus one declarative-rest infrastructure fix that enables the new capability shapes.

What

Per-adapter mutation/write surface expansion. Most adapters previously shipped a read-only or partial surface; this PR closes the obvious gaps so an agent can not just inspect but act.

Adapter	New capabilities
apollo	sequences.add_contacts
asana	tasks.addComment, tasks.complete
billplz	cancel.bill, create.refund
browse-ai	capturedLists.get, tasks.list
chatwoot	toggle_status, assign_conversation
devin	sessions.list, attachments.upload
emailit	logs.list
github	pulls.create, pulls.merge, issues.createComment, pulls.reviews.create
gitlab	merge_requests.create, merge_requests.accept, notes.create
heartbeat	threads.create, messages.create
hubspot	create_deal, update_deal_stage, create_ticket
intercom	contacts.create, contacts.update
just-invoice	invoices.send, invoices.markPaid, invoices.update
kimai	timesheets.stop, timesheets.list, projects.list
kissflow	process.instance.create, process.instance.submit
lemon-squeezy	subscriptions.cancel, orders.issueRefund
mailchain	messages.inbox.list
mattermost	update_post, delete_post, add_reaction
nifty	tasks.update, comments.create
outlook-mail	send_message, create_draft
pipedrive	activities.create, notes.create
shippo	transactions.create, tracks.get
shopify	refunds.create, fulfillments.create, draft_orders.create
slack	post_in_thread, update_message, delete_message, add_reaction, upload_file
stripe-pack	create_payment_intent, create_refund, create_customer
twin-labs	browsing.stop, browsing.get
twitter	tweets.delete, tweets.like, tweets.retweet, dms.send
vouchery-io	vouchers.redeem, vouchers.void
zapier	actions.list, actions.execute

All new mutations carry cas: 'native-idempotency' + externalEffect: true per the ConnectorAdapter contract.

Infrastructure fix

declarative-rest.ts: two changes the new capabilities depend on.

1. Preserve baseUrl path. new URL('/x', 'https://api/v1') drops /v1 because absolute paths reset to origin. Strip the leading / from operation paths so a baseUrl with a prefix (api.emailit.com/v1, www.billplz.com/api/v3) keeps it.
2. Recursive body interpolation. renderValue now recurses into arrays and nested objects so adapters that ship structured bodies (billplz, emailit, lemon-squeezy) get their {placeholder} strings interpolated instead of shipped as literals.

Both are pure platform fixes — no behavior change for adapters with flat bodies and prefix-free baseUrls.

Tests

• 2617 / 2617 passing locally (pnpm exec vitest run).
• 30 disjoint adapter commits, each shipping adapter code + adapter tests together.
• One fix(declarative-rest) commit lands the platform change.
• pnpm exec tsc --noEmit clean.

[tangletools]

Approved — write-side capability expansion across 30 integration adapters. All 2617 tests green; declarative-rest infrastructure fix is sound (baseUrl path preservation + recursive body interpolation are correct for the new structured-body adapters). Per-adapter commits keep diff bisectable.