cripts: shrink Context from 3408 to 1920 bytes, expand data[] to 16

[zwoop]

Pimpl Url::Path and Url::Query state behind unique_ptr so the heavy vector/unordered_map/cripts::string members only allocate when a script actually decomposes the path or query. Lazy-allocate Pristine, Parent, and Remap From/To URLs in _UrlBlock — they're rarely all touched, and the embedded 384-byte Url objects dominated the per-txn cost. Pimpl Error::Reason for the same reason. Drop the unused INET6_ADDRSTRLEN buffer in detail::ConnBase. Make cripts::Url's destructor virtual now that we delete via unique_ptr. Bump CONTEXT_DATA_SLOTS from 4 to 16 so scripts have room to stash more per-txn state — the 384-byte cost sits inside the budget freed by the URL/Connection cuts.

[Copilot]

Pull request overview

This PR reduces per-transaction cripts::Context footprint by lazily allocating heavier URL/query/path/error state only when accessed, and expands the per-txn Context::data[] slots to allow scripts to stash more state.

Changes:

• PIMPL/lazy-allocate Url::Path and Url::Query internal state (segments / unordered_map / storage) and make their assignment operators return references.
• Lazy-allocate rarely-used URL objects in Context (Pristine, Parent, Remap From/To) and Error::Reason via std::unique_ptr.
• Increase CONTEXT_DATA_SLOTS to 16 and remove an unused INET6_ADDRSTRLEN buffer from detail::ConnBase.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/cripts/Urls.cc	Implements lazy URL slot allocation and moves path/query segment/param storage behind per-component state.
src/cripts/Error.cc	Lazily allocates Error::_reason when setting a reason message.
src/cripts/Context.cc	Resets lazy URL slots by releasing unique_ptrs between transactions.
include/cripts/Urls.hpp	Introduces State pimpls for Path/Query, updates APIs, and makes Url destructor virtual.
include/cripts/Error.hpp	Switches Error::_reason to std::unique_ptr<Reason>.
include/cripts/Context.hpp	Expands Context::data[] slots and changes URL block members to unique_ptr for lazy creation.
include/cripts/Connections.hpp	Removes an unused string buffer from detail::ConnBase.