fix: preserve exception subtype in request(), render params/timeout in as_curl()

request() re-raised every aiohttp.ClientError subclass as the bare base class,
losing ClientConnectorError/ClientProxyConnectionError/ClientResponseError
(.status/.headers)/TooManyRedirects and their attributes; direct callers
branching by type never matched. Now the original exception is bare-raised,
preserving subtype, attributes, and __cause__. request_with_retries (which
catches the base ClientError) is unaffected.

as_curl() silently dropped params and timeout, so a debug=True replay of a
params-driven request hit a different URL than the one actually sent. params
are now merged into the URL via yarl before quoting, and timeout renders as
--max-time.

Bumps 0.1.7 -> 0.1.8.

Signed-off-by: disqualifier <dev@disqualifier.me>

README.md

@@ -11,18 +11,18 @@ and swap the HTTP client while inheriting everything else.
 `requirements.txt`:
 
 ```
-aioweb @ git+ssh://git@git.rethinkstudios.io/rethink-public/aioweb.git@v0.1.7
+aioweb @ git+ssh://git@git.rethinkstudios.io/rethink-public/aioweb.git@v0.1.8
 ```
 
 Direct:
 
 ```bash
-pip install "aioweb @ git+ssh://git@git.rethinkstudios.io/rethink-public/aioweb.git@v0.1.7"
+pip install "aioweb @ git+ssh://git@git.rethinkstudios.io/rethink-public/aioweb.git@v0.1.8"
 ```
 
 Requires `aiohttp` and `yarl` (pulled transitively).
 
-Drop the `@v0.1.7` suffix from the line above to install the latest unpinned.
+Drop the `@v0.1.8` suffix from the line above to install the latest unpinned.
 
 ## Usage
 
@@ -65,6 +65,15 @@ resp = await s.request_with_retries(
 
 Returns a `FailureResponse` (falsy) if every attempt fails.
 
+`request()` (the non-retrying call) raises on failure: a total timeout raises
+`aiohttp.ServerTimeoutError`, and any other network/protocol failure raises its real
+`aiohttp.ClientError` subtype as-is (`ClientConnectorError`, `ClientProxyConnectionError`,
+`ClientResponseError` with `.status`/`.headers`, `TooManyRedirects`, ...) — it is not
+flattened into the base `ClientError`, so direct callers can branch by type or read
+subtype attributes. `request_with_retries` catches the base `aiohttp.ClientError` (and
+`asyncio.TimeoutError`) across all attempts and returns a falsy `FailureResponse` instead
+of raising.
+
 ## Header overwrites & ephemeral headers
 
 ```python
@@ -88,7 +97,10 @@ s.overwrite_domain("internal.local", "127.0.0.1")   # host-substring rewrite
 print(s.preview("POST", url, json={"a": 1}).as_curl())   # equivalent cURL command
 ```
 
-Pass `debug=True` to `request_with_retries` to log the cURL preview and request flow.
+`as_curl()` renders `params` (merged into the url's query string) and `timeout` (as
+`--max-time`) as well as headers/body/proxy, so the emitted command is faithful to what
+`request()` actually sends. Pass `debug=True` to `request_with_retries` to log the cURL
+preview and request flow.
 
 ## Custom backends
 
@@ -132,6 +144,23 @@ Two changes can't be shimmed without re-introducing the bugs they fix:
 
 ## Changelog
 
+### v0.1.8
+
+- **`request()` no longer flattens `aiohttp.ClientError` subtypes.** Every failure
+  (connect errors, proxy errors, `raise_for_status()`-style response errors,
+  redirect limits, ...) was re-raised as a bare `aiohttp.ClientError`, losing the
+  real subtype and its attributes (`.os_error`, `.status`, `.headers`, ...) — a
+  direct caller doing `except ClientProxyConnectionError:` or `if e.status == 401`
+  would silently never match. Now the original exception is re-raised as-is (its
+  subtype, attributes, and `__cause__` all preserved). `request_with_retries`
+  still catches the base `aiohttp.ClientError` across attempts, so its behavior
+  (and its `FailureResponse` return on exhaustion) is unchanged.
+- **`as_curl()` now renders `params` and `timeout`.** Previously a preview built
+  with `params=` silently omitted the query string (and a `timeout=` omitted
+  `--max-time`), so a `debug=True` cURL replay of a params-driven request hit a
+  different URL than the one actually sent. `params` are now merged into the url's
+  query string (via `yarl`) and `timeout` is emitted as `--max-time`.
+
 ### v0.1.7
 
 - **`get_cookies()` now returns real cookies.** Previously called `filter_cookies()`